Develop Bugs

When buying microsd does class matter much?

I know speeds are:
Class 4 - Minimum of 4 MB/s performance.
Class 6 - Minimum of 6 MB/s performance.
Class 10 - Minimum of 10 MB/s performance.
Can the Galaxy S even get up to class 10 if I go that route?

Yes, it matters a buttload.
Yes the Vibrant can make full use of the fastest chips out there.
Spend a few dollars more at Newegg and get a good chip from a known maker (Crucial, PNY, Micron, etc). The stuff is pretty cheap anyways....worth a few bucks just for piece of mind.
http://www.newegg.com/Product/Produ...00007962 600006209&IsNodeId=1&name=Micro SDHC
I'd suggest staying clear of Kingston and *possibly* Patriot.
I've nver seen Kingston stuff work as advertised and Patriot is a hit or miss at best.

Agree with n2ishun
I agree withn2ishun
Crucial and the other he mentioned are way more ereliable and have a better burst capacity (ability to write for shot periods of time faster than normal benchmark).
SD Memory Card basic breakout these are just averages i have in my phone a 16 gig card that claims 20+mb transfer rate never checked it but it is fast
Speed Class -2 Normal Bus I/F SD, miniSD, microSD
micro SDXC data rate less than 3 mb per sec
Speed Class - 4 6 HD ~ Full HD video recording above less than 7 mb per sec
Speed Class - 10 High Speed Bus I/F Full HD video recording 10 Greater than 10 mb per sec
UHS Speed Class 1 UHS-I Bus I/F HD TV Real time recording (only available on bigger cards)

micro sd card advice (manufacturer advice)
n2ishun said:
Spend a few dollars more at Newegg and get a good chip from a known maker (Crucial, PNY, Micron, etc). The stuff is pretty cheap anyways....worth a few bucks just for piece of mind.
I'd suggest staying clear of Kingston and *possibly* Patriot.
I've nver seen Kingston stuff work as advertised and Patriot is a hit or miss at best.
Click to expand...
Click to collapse
I dont know much about phone memory. i'll be getting my first smart phone this week (vibrant). I followed the link and the only company you had listed that i saw was PNY and they only sold cards at class 4 speeds. So besides kingston and patriot are the other's ok? Centon had a few class 6 cards that i was looking at. Or perhaps i should be asking are there any other companies i should stay away from?
thanks in advance

A lot of brands are okay. Well, that is if you buy it from a legit retailer and not from ebay where there is a chance for you to get a fake one.
Sandisk, PNY, Kingston, Adata, Transcend (I have a class 6 one), Crucial, and etc. They are all about the same. Go to Newegg for reviews.

Ah ok.
thanks alot.
Rodrigo

dont forget about meritline.com.
i get all my sd cards from there.

It only matters if you're impatient.

dezvous said:
It only matters if you're impatient.
Click to expand...
Click to collapse
I wouldn't say "impatient" but sometimes we have better things to do than sit there and wait for a file to finish transferring. Especially big files.

Usually files don't really get big enough on phones for 4mbs to be a huge problem.
But I'm not going to argue with you, the faster the better definitely. The good thing is there usually isn't a big difference in price between the different classes if you're shopping in the right places either.

the stock card is a class 4. I have an 8GB class 6 from my G1 days when we were doing 3 partitions on one card (crazy to me now). Does it matter? Yeah... Is it worth spending a lot of money on? Matter of opinion... how much are you using the sd card for read/write? I use the internal memory most.

I can see speed being an issue if you're taking a lot of pictures and video and saving to SD card. I usually use my external just for music, so Class 2 is fine for that (still, wouldn't turn down a Class 6 card if the cost differential were slight).

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.

Maximum Micro SD Card worth buying?

I believe that all micro sd speed classes work with the HTC 10:
UHS-I U1, UHS-I U3 and UHS-II U3 (the fastest available).
But the whats the maximum speed this Snapdragon 801 SOC allows? What´s the maximum speed supported, when the SOC reaches it´s top speed?
Could someone with any of these these cards please perform a speed read and write test so we can see if it´s worth buying the fastest available or not?
Cheers

HTC 10 uses a snapdragon 820, not 801.
I believe the maximum card it will take is 2TB.
Sent from my HTC 10 using Tapatalk

Double post

Sunmisola said:
HTC 10 uses a snapdragon 820, not 801.
I believe the maximum card it will take is 2TB.
Sent from my HTC 10 using Tapatalk
Click to expand...
Click to collapse
Correct, 820 SOC, sorry.
My question was regarding the speed and not storage size. I just confirmed that the snapdragon 820 it's compatible with the UHS-II cards (they have a second row of pins) but only work at UHS-I speeds.
Cheers

Oh sorry, I guess I should slow down to read. Yeah I never really knew what speed was supported, I just use a Samsung Evo UHS 2
Sent from my HTC 10 using Tapatalk

Sunmisola said:
Oh sorry, I guess I should slow down to read. Yeah I never really knew what speed was supported, I just use a Samsung Evo UHS 2
Sent from my HTC 10 using Tapatalk
Click to expand...
Click to collapse
The faster ones? Can you please do a speed test?
Cheers

If you have a look at the XDA review of the 10 you'll see it has one of the fastest sd slots on the market, I confirmed this by using a1 sd bench testing my 128gb Sandisk Extreme which gave me 86.60mb/s read and 57.47mb/s write, essentially maxing out the card, whilst internal memory gave me 226.41mb/s read and 35mb/s write (likely due to encryption). Copying from internal to micro sd copied at a consistent 55-60mb/s as well which is top for a phone.
Really impressed overall, I had a whole heap of issues with slow NAND on my one x and to a much lesser extent m8 (slow sd slot), but the 10 provides a great experience in these areas. So in short, go for the fastest card you can afford, the 10 will be able to take advantage of the extra speed, I personally went through quite a few cards and recommend the 128gb Sandisk Extreme for $60 AUD (60/90) or 128gb Toshiba u3 (30/80) for $40 AUD, otherwise the Samsung cards are pretty bullet proof but 4k video might stutter on the Evo cards and below due to slow write (20-25mb/s tops).

ryanjsoo said:
If you have a look at the XDA review of the 10 you'll see it has one of the fastest sd slots on the market, I confirmed this by using a1 sd bench testing my 128gb Sandisk Extreme which gave me 86.60mb/s read and 57.47mb/s write, essentially maxing out the card, whilst internal memory gave me 226.41mb/s read and 35mb/s write (likely due to encryption). Copying from internal to micro sd copied at a consistent 55-60mb/s as well which is top for a phone.
Really impressed overall, I had a whole heap of issues with slow NAND on my one x and to a much lesser extent m8 (slow sd slot), but the 10 provides a great experience in these areas. So in short, go for the fastest card you can afford, the 10 will be able to take advantage of the extra speed, I personally went through quite a few cards and recommend the 128gb Sandisk Extreme for $60 AUD (60/90) or 128gb Toshiba u3 (30/80) for $40 AUD, otherwise the Samsung cards are pretty bullet proof but 4k video might stutter on the Evo cards and below due to slow write (20-25mb/s tops).
Click to expand...
Click to collapse
Thanks for your answer. I just ordered the Samsung Evo PLUS UHS-I U3 64Gb since it has faster random write speeds than the PRO, even costing less. Sequential speed is slower, though. http://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-microsd-card which is important if you want to format it has adoptable storage.
So you have a UHS-I U3 Speed Class card, correct?
But you do know that UHS-II U3 cards do not work faster than at UHS-I speeds, right? It's important that people know the extra row of pins which enables it to work at 150mbs and more does not currently work with any smartphone on the market. I say this because they are very expensive and you can only take advantage of that speed when using it with an adapter connected to a PC. So buying it is kind of wasting money since they are much more expensive.
Cheers

investing here...

Badelhas said:
Thanks for your answer. I just ordered the Samsung EVO UHS-I U3 64Gb since it has faster random write speeds than the PRO. http://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-microsd-card which is important if you want to format it has adoptable storage.
So you have a UHS-I U3 Speed Class card, correct?
But you do know that UHS-II U3 cards do not work faster than at UHS-I speeds, right? It's important that people know the extra row of pins which enables it to work at 150mbs and more does not currently work with any smartphone on the market. I say this because they are very expensive and you can only take advantage of that speed when using it with an adapter connected to a PC. So buying it is kind of wasting money since they are much more expensive.
Cheers
Click to expand...
Click to collapse
So you ended up getting the 10 Badelhas? Hope you're enjoying the phone if you did.
Yep, I'm using a U3 (30mb/s min write), UHS-I card, it does NOT have the extra pins that enable faster performance that UHS-II cards have. You're right, UHS-II cards are far too expensive anyway and the 10 doesn't support them. Honestly wouldn't recommend using adoptable storage, it'll really slow the phone down since the performance becomes bound by the slower memory (the card), even with my Extreme card, performance was noticeably worse, at least in my experience. Pretty much the only benefit of using adoptable storage is for installing games/apps, but if you need it, I can't stop you (as much as I would like to).

ryanjsoo said:
So you ended up getting the 10 Badelhas? Hope you're enjoying the phone if you did.
Yep, I'm using a U3 (30mb/s min write), UHS-I card, it does NOT have the extra pins that enable faster performance that UHS-II cards have. You're right, UHS-II cards are far too expensive anyway and the 10 doesn't support them. Honestly wouldn't recommend using adoptable storage, it'll really slow the phone down since the performance becomes bound by the slower memory (the card), even with my Extreme card, performance was noticeably worse, at least in my experience. Pretty much the only benefit of using adoptable storage is for installing games/apps, but if you need it, I can't stop you (as much as I would like to).
Click to expand...
Click to collapse
No, I still haven't bought the 10, still debating. I have an old class 10 32gb micro sd card on my HTC one m8 and since I ordered a new Samsung 850 EVO 250gb SSD for my pc I thought "what the heck, I'm ordering a new, bigger and faster micro sd card". Impulse buying, I know ? But it only cost 18 euros.
I hope that my HTC One M8 is able to take advantage of the faster speed of the card but that user's post made me think I probably won't

I've just realized that the samsung evo+ I ordered is a UHS-I U1 card and not a U3 speed class so I just canceled my order.

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!
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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?
Click to expand...
Click to collapse
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!
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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?
Click to expand...
Click to collapse
reviad said:
What did you get instead of the 1800x?
Sent from my SM-G965U1 using Tapatalk
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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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Click to collapse
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.
Click to expand...
Click to collapse
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: