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Difference between Sandisk Ultra microsd card and normal card?

I'm going to buy a 16GB microsd card from sandisk. I've been finding on Amazon and found these two products:
Sandisk 16GB Mobile Ultra MicroSD Card : £36.00
SanDisk 16GB microSDHC Memory Card : £15.99
I've also noticed they're all class 2 (can't find a class 4 or class 6 sandisk). So what is the difference between them? I'm using the card for Windows Phone 7, so which one should I buy?

Ha, i'm looking to buy a 16Gb card for my htc desire and I was looking at exactly the same cards.
As far as I found so far the ultra version seems to be class 4.
If you have any new info it will me much appreciated.

well in some pages you can find comparative boxes about those micro sd, i remember that microsd 16 gb sandisk (class4) is more faster than 16 gb kingtons class4 , so i supousse that this ultra micro sd is like class 6 real XD, i will find some information about it, oh plz don't forget that some devices don't support those kind of micro sd (an example htc hd2 has little bugs with microsd class 4, i have one...)
Sorry if i don't write well but i'm peruavian =)

Hey guys,
Can any of you confirm if Android is booting from Sandisk 16GB Mobile Ultra MicroSD Card ?
I want to buy one but i saw in forums that some cards doesn't work for this..

the ultra one has the better speed and more stable than the normal one. And, it has the same compatitablity.
So, if you are not concern about the price, the ultra one is the better choice.
Also, that should have the extreme III type, that is the best~

Go for the Ultra microSD, it's faster!! been using a 8Gig on my phone and damn its fast!!

16GB Sandisk Micro SDHC
I'm currently using 16GB Sandisk Micro SDHC (class 4) for my LG P500. It is fast & I have not encountered any issues so far.
I've been using Sandisk memory cards for other gadgets & I think it is one of the most reliable brands that is available in my location.

With sandisk/kingston, class 2 should be fine too. CLASS 4 might help recording high def video

Stick with the name brands and forget the Chinese non name brand off off of Flea-bay, they are crap and do not work imho!!

The more expensive cards are usually just higher speed.
I use fast cards in my DSLR to help when shooting bursts. Slower cards fill up, and drop the fps.

I'm currently using 16GB Sandisk Micro SDHC
Go for the Ultra microSD, it's faster!!

You should choose your memory card depending on what you're going to use it for. Either way, you should go with Sandisk cards, as they are the highest quality and produce their own chips. Kingstons should be avoided even though for some reason they are known as a quality brand... kingston just buys chips from other manufacturers and puts their name on them.... you will find many different kinds of chips inside kingston, so you will find more variation and defects from batch to batch.
As far as class, that is only referring to the sequential write speed. If you are getting the card for a digital camera, then a high class card is good, because you will be writing a lot of files sequentially.
But if you plan on using the card for WP7 or to run android of off, generally a class 2 or 4 card is better, because they have better random access speeds. The tweaks card makers do to make cards have higher sequential write speeds many times will lower the random access speed, so you will have more issues running WP7 or Android off of a class 6 or 10 card.

for 8gb ultra i got with usb2.0 card reader : 13mb/s write , 20.5mb/s read

I know the thread is old, but still.
zarathustrax said:
You should choose your memory card depending on what you're going to use it for. Either way, you should go with Sandisk cards, as they are the highest quality and produce their own chips. Kingstons should be avoided even though for some reason they are known as a quality brand... kingston just buys chips from other manufacturers and puts their name on them.... you will find many different kinds of chips inside kingston, so you will find more variation and defects from batch to batch.
As far as class, that is only referring to the sequential write speed. If you are getting the card for a digital camera, then a high class card is good, because you will be writing a lot of files sequentially.
But if you plan on using the card for WP7 or to run android of off, generally a class 2 or 4 card is better, because they have better random access speeds. The tweaks card makers do to make cards have higher sequential write speeds many times will lower the random access speed, so you will have more issues running WP7 or Android off of a class 6 or 10 card.
Click to expand...
Click to collapse
I know thread is too old to write anything. But still (since google pointed me here)...
I've used both types of cards and have found that Sandisc ultra (Red & Black) is far better in speeds and reliability than the Sandisc simple/normal black colour chips. Also know that there are further/more better than ultra, called by Sandisc as extreme and Extreme Pro.
Also warranty for all is same: Lifetime. And Sandisc provided me a new chip within 25 days after my old 32 normal chip went faulty.

Re
I would always buy a class 10 card, because when you copy your photos it doesn't take so much time...

I discovered - the hard way - that "normal" class 2 or 4 MicroSD cards won't stay alive very long on Samsung Note 4 or similar phones... One day they stop working and all pictures and info is lost forever. The only MicroSD that can get the job done is a Class 10 UHC Sandisk card. I have used Kingston and all died only after a few months, specially if you install apps on them. They can´t handle the workload and you will end up losing everything you have on them. I have one of the red and gray Sandisk cards and it's awesome. It's fast and it's still working after 2 and a half years of use in a Sony Xperia Z2. Gotta love this little tough card.

[Q] Question on MicroSD speeds

Can anyone comment yet on the speeds they are getting with their internal microsd cards for read and write?
I would like to see if it is worth splashing out on an expensive high speed card, or because it is running USB2 that in real terms it is crippled to about 20MBps read/write. It would be a pitty if the speeds are crappy, as samsung is making some pretty sweet microsd cards these days.
Regards

hardjards said:
Can anyone comment yet on the speeds they are getting with their internal microsd cards for read and write?
I would like to see if it is worth splashing out on an expensive high speed card, or because it is running USB2 that in real terms it is crippled to about 20MBps read/write. It would be a pitty if the speeds are crappy, as samsung is making some pretty sweet microsd cards these days.
Click to expand...
Click to collapse
Afaik, sd card doesn't use the usb bus.
I have a cheap 64GB microsd and it gives 40/18mbps on the 8.4 pro on a1 sd bench tests

ssuper2k said:
Afaik, sd card doesn't use the usb bus.
I have a cheap 64GB microsd and it gives 40/18mbps on the 8.4 pro on a1 sd bench tests
Click to expand...
Click to collapse
Thank you very much Ssuper2k. That is good to know if you are getting decent speeds on a cheap 64GB microsd. Anyone got any high rated SD cards share any light on what it tops out at ?
Thanks again.

hardjards said:
Thank you very much Ssuper2k. That is good to know if you are getting decent speeds on a cheap 64GB microsd. Anyone got any high rated SD cards share any light on what it tops out at ?
Thanks again.
Click to expand...
Click to collapse
Heres mine... Sandisk 64GB Class 10

BossJ said:
Heres mine... Sandisk 64GB Class 10
Click to expand...
Click to collapse
That is not the SD card...
My g.skill 64GB class 10 benchmarks around 44MB/sec read, 14 write. It cost $25.

Skitals said:
That is not the SD card...
My g.skill 64GB class 10 benchmarks around 44MB/sec read, 14 write. It cost $25.
Click to expand...
Click to collapse
ooops. you are right... a1 sd bench labels it wrong. It says Internal SD card as my external and my internal as my external. (Sorry)
Here's my new results - reading 40 MB/sec 14 MB/s write..
Once again - sorry about that.

Guys, when you say Class 10 you aren't really speaking to the speed of the card. There is a wide range of speeds in cards that are all rated as class 10. Samsung has some that are 90 read and 80 write for example and most only advertise as 30 read and don't even say their write. Anyone have one of Samsung's good 90/50 or 90/80 cards they have tested?

I have just benchmarked a 64GB Samsung Pro MicroSDXC card (rated at 90MB/s read, 80MB/s write). In a USB 3.0 card reader on my computer it writes at around 65MB/s average and reads at upwards of 80MB/s.
In the Tab S 8.4 (Wi-Fi only model) it benchmarks at 49.53MB/s read and 24.53MB/s write in A1 SD Bench

So what would anyone say... Is the best card for this particular device? Any recommendations?

If you're not planning on taking the MicroSD card out of the tablet in order to transfer content onto it, then you might as well just go for a mid-range card as it will be limited by USB 2.0 transfer speeds anyway. I'd say the Samsung Evo or the old Samsung Pro card would be fine depending on pricing.

I dont plan on taking it out. Since the above Benchmade had the pro at 49.53MB/s read. I feel It's just going to be overkill. Since its not getting the full 90 MB/s read 80MB/s write. I'm thinking the Evo should suffice. What are your thoughts?

I meant the old Pro model, which I think was 70MB/s Read - 20MB/s write, these can sometimes be had for similar money as the new Evo. I think you'd be fine with either of those, or even the Plus model. I think the Samsung MicroSDs are fairly reliable in general.

So nobody knows if Tab S has standard bus, high speed bus or Ultra High Speed Bus UHS-I or UHS-II?
I think that micro SD card Class 10 U3 guarantees minimum 30MB/s. So it supports even 4K recording...
But I still don't know if it is worth of a lot of money. If benchmarks are true - Tab S has UHS (your 45MB/s). If!

bus speeds
belek1979 said:
So nobody knows if Tab S has standard bus, high speed bus or Ultra High Speed Bus UHS-I or UHS-II?
I think that micro SD card Class 10 U3 guarantees minimum 30MB/s. So it supports even 4K recording...
But I still don't know if it is worth of a lot of money. If benchmarks are true - Tab S has UHS (your 45MB/s). If!
Click to expand...
Click to collapse
According to Samsung support, the Tab S micro SD speeds is limited by the USB 2.0 bus, or 60 MB/s. So that would imply UHS, though the 90MB/s cards would not get the full speed. I would like to see someone test a 90MB/s card and see what the results are. Probably just going to go with a 48MB/s card if there isn't any difference. Though I think write speeds are significantly different between the higher speed UHS-I cards and the lower speed ones (50 vs 10 MB/s write I think).
If anyone has a couple cards and a Tab S they can test with, I would love to see the results.

So I bought a UHS-3 SD Card for my G3. Overkill?

Hi
I bought a SanDisk Extreme UHS-3 SD Card out of impulse today.
I'm unsure if the G3 has enough bandwidth to deal with it.
Has anyone bought a UHS-3 SD Card and is using on his G3?
Tapatalked thru my LG G3

Bump
Nobody tried? Couldn't find any info either
Tapatalked thru my LG G3

I am using a 64gb Sandisk extreme UHS-I U3 (UHS Level 3) card. Seems to work fine. I don't understand what issue you were logically expecting to experience.

gandalf_grey91 said:
I am using a 64gb Sandisk extreme UHS-I U3 (UHS Level 3) card. Seems to work fine. I don't understand what issue you were logically expecting to experience.
Click to expand...
Click to collapse
Improved speeds etc. I thought about using MultiROM on it.. Could you please run A1 SD bench and post the results?
I'm getting pretty much the same card as you

GTMoraes said:
Improved speeds etc. I thought about using MultiROM on it.. Could you please run A1 SD bench and post the results?
I'm getting pretty much the same card as you
Click to expand...
Click to collapse
Read 67.05MB/s Write 31.64MB/s

gandalf_grey91 said:
Read 67.05MB/s Write 31.64MB/s
Click to expand...
Click to collapse
Write speed looks very good, but read is disappointing...
thanks! But it seems that the G3 is limited to UHS-I =/

I am getting 38.44 and 20.03 only for samsung evo uhs 1 I guess your result is pretty good

Zenroid said:
I am getting 38.44 and 20.03 only for samsung evo uhs 1 I guess your result is pretty good
Click to expand...
Click to collapse
I'm using a Samsung Class 10 SD Card. Terrible 44.34MB/s read and 17.38MB/s write, default benchmark
Using the Precise Benchmark, I'm getting 59.7MB/s read and 19.22MB/s write. It's too bad.
In comparison, I'm getting 183.92MB/s read and 38.7MB/s write on the internal memory (precise benchmark, with reboot)
I expected somewhere near the internal memory read speeds with the Sandisk extreme, but at least there's the decent write speed.
I wanted to run some ROMs on the memory card, but with those read speeds, it doesn't seem feasible.
Or perhaps the G3 internal memory is just absurdly fast. I'll try with some other devices around my home
---
Funny. The Galaxy S4 Mini here has slower internal memory than my Class 10 SD Card. But still, if I install Android on my SD Card, it'll be as slow as taking 10~20 seconds to open a simple app.
I don't get it

gandalf_grey91 said:
Read 67.05MB/s Write 31.64MB/s
Click to expand...
Click to collapse
Just received my UHS-3 card.
Pretty disappointed by the read speeds.
I was getting ~65MB/s read and ~14MB/s write.
The SanDisk Extreme is giving me ~48MB/s read and ~30MB/s write.
Massive improvement in write, but messed up in read.... I don't know what's wrong

GTMoraes said:
Just received my UHS-3 card.
Pretty disappointed by the read speeds.
I was getting ~65MB/s read and ~14MB/s write.
The SanDisk Extreme is giving me ~48MB/s read and ~30MB/s write.
Massive improvement in write, but messed up in read.... I don't know what's wrong
Click to expand...
Click to collapse
Being the inventor of trans flash memory, Sandisk seems to feel the need to provide a distinct USP, over and above the competition, for it trans flash memory products. Unfortunately this usually means they are surfing very close to edge of their fabrication technology. I base this on my observation of the ever-changing product code attached to Sandisk 128GB micro sd cards, which has changed 3 times in the last 10-12 weeks.
Put simply, like CPUs, I believe Sandisk are speed testing and grading their trans flash products, the extreme range is exactly the same as the ultra range, only labeled and marketed differently. Because there is no distinct technological advantage, there is likely to be a more pronounced range in both read and write speeds. So, while a tested write speed of, for example, 30MB/s may mean an individual micro sd card can be labeled as "extreme" by Sandisk, doesn't mean its read speed will be consistent with every other micro sd card labeled as "extreme".
Oh, and remember, only 4KB random write speed is the true write speed test for memory cards. This is the specification that makes the real difference if you need to boot an OS from the card.

gandalf_grey91 said:
Being the inventor of trans flash memory, Sandisk seems to feel the need to provide a distinct USP, over and above the competition, for it trans flash memory products. Unfortunately this usually means they are surfing very close to edge of their fabrication technology. I base this on my observation of the ever-changing product code attached to Sandisk 128GB micro sd cards, which has changed 3 times in the last 10-12 weeks.
Put simply, like CPUs, I believe Sandisk are speed testing and grading their trans flash products, the extreme range is exactly the same as the ultra range, only labeled and marketed differently. Because there is no distinct technological advantage, there is likely to be a more pronounced range in both read and write speeds. So, while a tested write speed of, for example, 30MB/s may mean an individual micro sd card can be labeled as "extreme" by Sandisk, doesn't mean its read speed will be consistent with every other micro sd card labeled as "extreme".
Oh, and remember, only 4KB random write speed is the true write speed test for memory cards. This is the specification that makes the real difference if you need to boot an OS from the card.
Click to expand...
Click to collapse
That was very informative. Yes, it seems that Sandisk is pushing any 30MB/s write card as Extreme, and if it complies with a minimum read (very minimum it seems), it's off to go.
I'm unsure whether should I return this card (need to pay shipping costs) or keep it as it is
Many thanks for this answer! I'll check for random 4kb write to see which one fares better
Tapatalked thru my CM12 G3!

GTMoraes said:
I'm unsure whether should I return this card (need to pay shipping costs) or keep it as it is
Click to expand...
Click to collapse
Two quotes from the Sandisk legal statement about Extreme 64GB micro sd card:
2) Card only. Up to 80 MB/s read; up to 50 MB/s write. Based on internal testing; performance may be lower depending upon host device.
(4) UHS Speed Class 3 designates a performance option designed to support real time video recording in U3-enabled host devices.
---------- Post added at 11:41 PM ---------- Previous post was at 11:26 PM ----------
GTMoraes said:
I'm unsure whether should I return this card (need to pay shipping costs) or keep it as it is
Click to expand...
Click to collapse
Sorry, previous numbers were for 64GB Extreme Plus micro sd cards (Costs twice as much). For 64GB Extreme micro sd card it should have read:
(2) Up to 60 MB/s read speed; up to 40 MB/s write speed. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors.
See what I said about grading the speed of the cards. Just so they can squeeze a little more money from their customers. BTW I see that Kingston and Lexar are doing 128GB micro sd cards now.

gandalf_grey91 said:
Two quotes from the Sandisk legal statement about Extreme 64GB micro sd card:
2) Card only. Up to 80 MB/s read; up to 50 MB/s write. Based on internal testing; performance may be lower depending upon host device.
(4) UHS Speed Class 3 designates a performance option designed to support real time video recording in U3-enabled host devices.
---------- Post added at 11:41 PM ---------- Previous post was at 11:26 PM ----------
Sorry, previous numbers were for 64GB Extreme Plus micro sd cards (Costs twice as much). For 64GB Extreme micro sd card it should have read:
(2) Up to 60 MB/s read speed; up to 40 MB/s write speed. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors.
See what I said about grading the speed of the cards. Just so they can squeeze a little more money from their customers. BTW I see that Kingston and Lexar are doing 128GB micro sd cards now.
Click to expand...
Click to collapse
I emailed my seller and he posted pretty much the same thing, and said my card was well within the normal operating speeds, and a replacement wouldn't make it any better.
I'm getting 51MB/s read and 33MB/s write nowadays. Guess something was running on the background back then.
Guess I'll have to live with it. It ain't too bad, and random 4k is better than the Samsung one
Tapatalked thru my CM12 G3!

The Extreme cards will get 40-50 but the Extreme Plus get around 80. The newer Pro gets 95. Its obvious Sandisk is inching forward trying to create a new product with a +$100 price point. I got lucky during the holidays and scored my 64gb Extreme Plus during the holidays for $30

xlxcrossing said:
The Extreme cards will get 40-50 but the Extreme Plus get around 80. The newer Pro gets 95. Its obvious Sandisk is inching forward trying to create a new product with a +$100 price point. I got lucky during the holidays and scored my 64gb Extreme Plus during the holidays for $30
Click to expand...
Click to collapse
Now that was a deal. I got my Extreme 64GB for what would be 90 US Dollars. That's the price around here unfortunately.
I've contacted again my seller and he seems to be okay with swapping my card. I ran the SD test three times for each of my 64GB cards to see how they would fare.
As expected, the Samsung has a higher read speed, but minimum write (Class 10, Minimum 10MB/s write speed, as I've read).
The SanDisk Extreme has a slightly lower write speed than what I thought would be 30MB/s, but nothing too bad. But read speeds are not that good, compared to a lower-end rival card.
http://imgur.com/a/KNGpT

Micro SD Card compatability?

I know, this is probably a silly question, but am I the only one that notices how devices only tend to label compatibility with Micro SD cards based on size, and not speed or class? For instance, my Galaxy Tab S2, it simply says it can take up to a 128gb SD card, but it does not say what speed it will work with.
The reason I ask, is that I am now in the market for a 128gb card, and yet I don't want to buy an expensive fast one, if my tablet will not be able to take advantage of the premium speed. Anyone have any thoughts?

I don't know about the speed but I have a SanDisk 200 GB that runs fine.
I think that any phone or tablet that will read 128 GB will also work with 200 GB.
Shofar

Don't worry
Any MicroSD card will work in your Galaxy Tab S2. But then, you might have to format it. When you buy the card, keep an eye out on the speed class- higher speeds are much better!
You are looking for a 128GB card, and I use one in my tablet so don't worry. It will work! But I seriously recommend a higher performance card because it can get very slow with cheaper cards.
Hope this helps!

I just tested a regular class 10 card and a UHS-1 card. Both tested at 9mb write and 40mb read. The same UHS-1 card tested over 40mb write using an Odroid C1 board.

lewmur said:
I just tested a regular class 10 card and a UHS-1 card. Both tested at 9mb write and 40mb read. The same UHS-1 card tested over 40mb write using an Odroid C1 board.
Click to expand...
Click to collapse
I suppose that means that using anything above class 10 is irrelevant?

wirelesskebab said:
I suppose that means that using anything above class 10 is irrelevant?
Click to expand...
Click to collapse
No, that means that "class" classification is outdated. Fast cards (read and write) bear the UHS-I "U3" classification, "U1" is slower.
In future, only buy U3 cards, like the SanDisk Extreme family.

saintsimon said:
No, that means that "class" classification is outdated. Fast cards (read and write) bear the UHS-I "U3" classification, "U1" is slower.
In future, only buy U3 cards, like the SanDisk Extreme family.
Click to expand...
Click to collapse
I guess you missed the part where I stated that the UHS card had a write speed of 40mb using the Odroid C1 board. Obviously, when it only writes 9mb in the S2, then the S2 itself doesn't support the higher speeds. So, no matter ability the card has, if the device's bus doesn't support the higher speed, then the card's ability is meaningless. Any card you use is going to be limited by the bus speed of the device.
Paying extra for a better card is pointless if the device doesn't support the higher speed.

lewmur said:
I guess you missed the part where I stated that the UHS card had a write speed of 40mb using the Odroid C1 board. Obviously, when it only writes 9mb in the S2, then the S2 itself doesn't support the higher speeds. So, no matter ability the card has, if the device's bus doesn't support the higher speed, then the card's ability is meaningless. Any card you use is going to be limited by the bus speed of the device.
Paying extra for a better card is pointless if the device doesn't support the higher speed.
Click to expand...
Click to collapse
This was what I meant, I'll make sure to buy a decent one but not the "best". Quick question, how are the internal memory write speeds? Actually, what card should I get then? How fast is the internal memory write speeds? Thanks!

Just tested the 32 GB SanDisk Extreme (U3 but not an Extreme Plus or Pro) in my T815 with the "A1 SD Bench" app:
read 59,70 MB/s or 61,04 MB/s, write 22,75 MB/s or 24,70 MB/s. The second numbers are the result of using the "accurate mode" of the test app.

saintsimon said:
Just tested the 32 GB SanDisk Extreme (U3 but not an Extreme Plus or Pro) in my T815 with the "A1 SD Bench" app:
read 59,70 MB/s or 61,04 MB/s, write 22,75 MB/s or 24,70 MB/s. The second numbers are the result of using the "accurate mode" of the test app.
Click to expand...
Click to collapse
Wat?! Is it possible that the LTE version (T815) vs T810 has a different card reader? If not happy days!

wirelesskebab said:
This was what I meant, I'll make sure to buy a decent one but not the "best". Quick question, how are the internal memory write speeds? Actually, what card should I get then? How fast is the internal memory write speeds? Thanks!
Click to expand...
Click to collapse
Why don't you install the A1 SD Benchmark from the Play Store and test your own cards? My internal storage rates 50mb write and 160 read.

Hi,
I'm considering this microSD for my new tablet s2, do you think is good quality?
http://www.amazon.it/Memoria-SanDisk-Android-MicroSDXC-Adattatore/dp/B010Q57S62/

nephtys59 said:
Hi,
I'm considering this microSD for my new tablet s2, do you think is good quality?
http://www.amazon.it/Memoria-SanDisk-Android-MicroSDXC-Adattatore/dp/B010Q57S62/
Click to expand...
Click to collapse
I am using this SanDisk 128 GB Micro SDXC UHS-1 / Class 10 card and it works fine! The price/performance is good.
In germany (Amazon.de) you can get the card for 33 € (+shipping costs).

nephtys59 said:
Hi,
I'm considering this microSD for my new tablet s2, do you think is good quality?
http://www.amazon.it/Memoria-SanDisk-Android-MicroSDXC-Adattatore/dp/B010Q57S62/
Click to expand...
Click to collapse
For our fast S2, this one is too slow in writing. Class 10 means only fast reading.
You better choose a Samsung or SanDisk with the "U3" designation, which means fast writing, like this:
http://www.amazon.it/Scheda-Memoria...sr=1-5&keywords=sandisk+extreme+pro+microsdxc

FOR EVERYBODY :
I have bought a LEXAR 633x 200GB !!!
And it works !
Speed : read 95Mo/s write : 40Mo/s
For 90$, it do the job very well !
The only better sdcard is the 256GB SAMSUNG but it's out of price !
​

So a higher performance card or 200GB eill make the tab s2 go faster then? What amount of storage and sd card do you recommend?

It won't make the tab S2 go faster. But it will allow faster read/writing to higher performance sd card compared to a regular one. The S2 can only go as fast as it's hardware can, with or without a microsd card.

Figured I'd share my results with my 2015 S2 8.0 (SM-T710). Right now I have a Samsung EVO Pro (U1) 64GB in my tablet and it does ok, but I'm just about to upgrade it to a new 128GB EVO PLUS (U3) card so got some results below. Note the previous 32GB card I had was waay worse, much older and only did 4MB/sec on writes (forgot the brand) but things have at least come a long way in the years since.
Results as follows...
Samsung EVO Pro 64GB (U1) - 70.53MB/sec Read - 72.86MB/sec Write (Fresh Format)
Samsung EVO Plus 128GB (U3) - 69.91MB/sec Read - 43.40MB/sec Write (Fresh Format)
Samsung EVO Pro 64GB (U1) - 70.07MB/sec Read - 17.81MB/sec Write (Only 4.9GB Free)
Samsung EVO Plus 128GB (U3) - 63.08MB/sec Read - 27.12MB/sec Write (Only 65.9GB Free)
For the heck of it tried the transfer rates on the PC for the 2 cards as well.
Samsung EVO Pro 64GB (U1) - 86.85MB/sec Read - 80.77MB/sec Write (Fresh Format)
Samsung EVO Plus 128GB (U3) - 87.04MB/sec Read - 82.27MB/sec Write (Fresh Format)
Though got to say while cards neck and neck, small file writes where 5x greater on the new U3 card (.5MB/sec vs 2.5MB/sec) on 4k writes.

MicroSD Speed for this phone?

It has been a while since I've needed to get a MicroSD card for a phone. As you all know, the 512 GB option is out of stock and the only thing I was able to get my hands on was a 128 GB version of the S20 Ultra. Company paid for it.
What MicroSD speed is recommended for this phone? Am I looking at getting at least V60 to be able to use this phone appropriately? What would give me an "internal storage" experience? I didn't always have great experiences with removable storage on phones with lag, but this was years ago when speeds weren't even close to what we have today.
Advice is appreciated. Thank you!

reviad said:
It has been a while since I've needed to get a MicroSD card for a phone. As you all know, the 512 GB option is out of stock and the only thing I was able to get my hands on was a 128 GB version of the S20 Ultra. Company paid for it.
What MicroSD speed is recommended for this phone? Am I looking at getting at least V60 to be able to use this phone appropriately? What would give me an "internal storage" experience? I didn't always have great experiences with removable storage on phones with lag, but this was years ago when speeds weren't even close to what we have today.
Advice is appreciated. Thank you!
Click to expand...
Click to collapse
How much storage space do you need? Size matters! Write Speed matters when you're shooting 4K Hi-Def Videos or Burst Photos. The Lexar Professional 1800x U3 microSD is very fast at a reasonable price as well. It's 128GB has all the speed you'll ever need and the smaller 64GB is even faster!

varcor said:
How much storage space do you need? Size matters! Write Speed matters when you're shooting 4K Hi-Def Videos or Burst Photos. The Lexar Professional 1800x U3 microSD is very fast at a reasonable price as well. It's 128GB has all the speed you'll ever need and the smaller 64GB is even faster!
Click to expand...
Click to collapse
I think an additional 128 GB would do the trick.
Looks like the 1800x is a v90 card, correct? Are v90 speeds comparable to internal storage speeds?

reviad said:
I think an additional 128 GB would do the trick.
Looks like the 1800x is a v90 card, correct? Are v90 speeds comparable to internal storage speeds?
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Yes it's v90 rated. I've yet to experience an SD or MicroSD which processes as quickly as Internal Storage. How much of a lag is dependent on File Type, MicroSD Capacity and Card Speed. I fly often and enjoy watching movies on my device and paying considerably more for High Capacity Internal Storage isn't compelling.
I also put every file possible on the MicroSD. I don't have faith in Cloud Storage Security and if for any reason my device malfunctions I won't sacrifice any data, plus whenever I upgrade a device I can forego time consuming file transfers. Movies are petty large files so I use a 512GB MicroSD which isn't as fast as a lower capacity card. When I open the file I experience a couple of seconds of lag. For me it's a non issue when I take into consideration all of the advantages.

reviad said:
I think an additional 128 GB would do the trick.
Looks like the 1800x is a v90 card, correct? Are v90 speeds comparable to internal storage speeds?
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No where near close. the 1800X is ok but I returned it as the speeds didn't match enough of the lower model(s) at the price point. Better to buy the higher internal storage model, but obviously may be too late.

I benchmarked the internal memory in my S20U 512GB against my 512GB Samsung EVO Plus microSD card. The results show that a microSD will not come close to the performance of the phone's internal memory.
Internal memory
Read: 1000.13 MB/s
Write: 384.36 MB/s
Samsung EVO Plus 512BGB MicroSD
Read: 72.27 MB/s
Write: 45.47 MB/s

varcor said:
How much storage space do you need? Size matters! Write Speed matters when you're shooting 4K Hi-Def Videos or Burst Photos. The Lexar Professional 1800x U3 microSD is very fast at a reasonable price as well. It's 128GB has all the speed you'll ever need and the smaller 64GB is even faster!
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Sleepycat3 said:
I benchmarked the internal memory in my S20U 512GB against my 512GB Samsung EVO Plus microSD card. The results show that a microSD will not come close to the performance of the phone's internal memory.
Internal memory
Read: 1000.13 MB/s
Write: 384.36 MB/s
Samsung EVO Plus 512BGB MicroSD
Read: 72.27 MB/s
Write: 45.47 MB/s
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Thanks. That's a UHS-I card, so it will be slower than the Lexar 1800x, which is UHS-II However, it really gives me an idea of differences that I can expect. Thank you for posting that.
I think I'm going to go with the Lexar 1800x and hope for the best.

shollywood said:
No where near close. the 1800X is ok but I returned it as the speeds didn't match enough of the lower model(s) at the price point. Better to buy the higher internal storage model, but obviously may be too late.
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What did you get instead of the 1800x?
Sent from my SM-G965U1 using Tapatalk

reviad said:
Thanks. That's a UHS-I card, so it will be slower than the Lexar 1800x, which is UHS-II However, it really gives me an idea of differences that I can expect. Thank you for posting that.
I think I'm going to go with the Lexar 1800x and hope for the best.
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You will need to check that the S20 supports UHS-II. I have not been able to find any confirmation that it does (it would be a great marketing advantage if it did, so I don't think it would have been a hidden feature), so I don't think it does. When you use a UHS-II card in a UHS-I device, the speed will default back to UHS-I because it is missing the extra pins required for UHS-II.

Sleepycat3 said:
You will need to check that the S20 supports UHS-II. I have not been able to find any confirmation that it does (it would be a great marketing advantage if it did, so I don't think it would have been a hidden feature), so I don't think it does. When you use a UHS-II card in a UHS-I device, the speed will default back to UHS-I because it is missing the extra pins required for UHS-II.
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You were right. I was incorrectly assuming that a phone at this price point would support UHS-II, but it does not. Well, that will save me a few bucks while forcibly sacrificing speed

reviad said:
I think an additional 128 GB would do the trick.
Looks like the 1800x is a v90 card, correct? Are v90 speeds comparable to internal storage speeds?
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Click to collapse
reviad said:
What did you get instead of the 1800x?
Sent from my SM-G965U1 using Tapatalk
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Lexar 633X, almost the same speeds, nothing noticeable in difference, benchmarking was like .3 difference

Sleepycat3 said:
You will need to check that the S20 supports UHS-II. I have not been able to find any confirmation that it does (it would be a great marketing advantage if it did, so I don't think it would have been a hidden feature), so I don't think it does. When you use a UHS-II card in a UHS-I device, the speed will default back to UHS-I because it is missing the extra pins required for UHS-II.
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UHS-II does allow faster file transfer on the S20 than UHS-I which I appreciate since I'm constantly uploading new movies. 270 MB Read, 250 MB Write with the Lexar 1800x which is around three times the speed of most UHS-I Cards. Will it give you Internal Storage speeds? External Memory Cards will likely never approach that lofty goal.

varcor said:
UHS-II does allow faster file transfer on the S20 than UHS-I which I appreciate since I'm constantly uploading new movies. 270 MB Read, 250 MB Write with the Lexar 1800x which is around three times the speed of most UHS-I Cards. Will it give you Internal Storage speeds? External Memory Cards will likely never approach that lofty goal.
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Would love to see a the speedtest of the Lexar 1800x UHS-II in the S20. If the main purpose is to upload movies into the card while on the PC through a UHS-II reader, then yes, there are speed benefits there. But it depends on the usage and how time critical that task is. When uploading from PC to the microSD card using a reader on your desktop, there is the opportunity to begin the upload into the MicroSD card, go away to grab a snack or dinner or breakfast. By the time you come back, it is all done. A different usage situation would be to copy directly into the MicroSD card while it is in your phone, so that would definitely benefit from higher speeds as you won't be able to use or bring your phone with you while it is copying.
The other interesting card for the S20 would be A2 rated cards. These have 4 times higher random write and almost 3 times higher random read IOs compared to A1 which in turn is better than not A rated cards. These would benefit if you were running apps off your microSD card. My Samsung Evo Plus 512GB performs almost at A1 levels, but way lower than A2.

reviad said:
It has been a while since I've needed to get a MicroSD card for a phone. As you all know, the 512 GB option is out of stock and the only thing I was able to get my hands on was a 128 GB version of the S20 Ultra. Company paid for it.
What MicroSD speed is recommended for this phone? Am I looking at getting at least V60 to be able to use this phone appropriately? What would give me an "internal storage" experience? I didn't always have great experiences with removable storage on phones with lag, but this was years ago when speeds weren't even close to what we have today.
Advice is appreciated. Thank you!
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If you wanna your micro sd speed to be as similar to the internal memory u need to use UFS Memory
https://www.samsung.com/us/computing/memory-storage/memory-cards/ufs-memory-card-128gb-mb-fa128g-am/

UFS is not supported on S20 .... so sad but it's true...

Sleepycat3 said:
Would love to see a the speedtest of the Lexar 1800x UHS-II in the S20. If the main purpose is to upload movies into the card while on the PC through a UHS-II reader, then yes, there are speed benefits there. But it depends on the usage and how time critical that task is. When uploading from PC to the microSD card using a reader on your desktop, there is the opportunity to begin the upload into the MicroSD card, go away to grab a snack or dinner or breakfast. By the time you come back, it is all done. A different usage situation would be to copy directly into the MicroSD card while it is in your phone, so that would definitely benefit from higher speeds as you won't be able to use or bring your phone with you while it is copying.
The other interesting card for the S20 would be A2 rated cards. These have 4 times higher random write and almost 3 times higher random read IOs compared to A1 which in turn is better than not A rated cards. These would benefit if you were running apps off your microSD card. My Samsung Evo Plus 512GB performs almost at A1 levels, but way lower than A2.
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I did a speed test on the 1800 already, nowhere close to what Varcor is claiming. Perhaps he/she can post proof of those speeds? Here is mine: