[Q] microSD vs microSDHC, speed differences? - Touch Pro2, Tilt 2 Windows Mobile General

When using FRX7.1 what kind of speed increase can I expect when upgrading to an SDHC card?

benutne said:
When using FRX7.1 what kind of speed increase can I expect when upgrading to an SDHC card?
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None.
SD vs. SDHC is mostly about capacity. The speed boost from using a C10 or C6 card isn't realized unless you're using it in a cam shooting high-def video - where data transfer speed is required.
I guess you might see a *slight* boost, but I seriously doubt it.

Find a card that has the fastest random-read/write performance for small file sizes (8kb-256kb). Use a program like CrystalDiskMark or ATTO32 Benchmark to test it. It doesn't matter if its 2gb or 32gb, C4/C6 or C10 (in fact, most C10 cards have worse random-read/write performance than some C4/C6 cards).
C2/4/6/10 all refer to a minimum requirement for sequential-writes (2mb/4mb/6mb/10mbps). For a digital camera recording 1080p video, sequential-write performance is important. But as far as running a hacked-up OS, where we're going to be reading/writing small 32kb files anywhere in the card, you're going to want something "fast" in that sense (My Sandisk 8gb C4 performs best, then my A-Data 16gb C6)

Related

SD cards size, speed, etc.

I want a SD card for my PDA2k. Can't anyone finally answer the question of the largest card size that is supported by this device? Also what are the read write speed for a standard SanDisk card compared to the 10/9 MB/s speeds of the Ultra II cards? Also can our devices actually support the faster read/write or is it unnecessary overkill? Anyone have any direct speed comparisons for any tasks comparing std. vs. Ultra II?
Found some results, still looking for advice
I finally found some test results for read/write speed for Sandisk regular SD cards. 6/4 MB/s see here: http://www.tcmagazine.info/articles.php?action=show&id=4&perpage=1&pagenum=2 . So with the Sandisk Extreme at 10/9 and the Extreme III at 20/20 there is a large difference. Now again the questions are: Can our devices support the new 2GB cards and in real world applications, such as file storage, mp3 and wmv storage and playback and GPS map useage, are these higher speeds really noticeable?
Hi
I have a kingmax platinum 1G card (60x) and a bog standard sandisk 1G card. Dont notice any difference on my XDA IIs.
On a PC in a USBII reader, the kingmax is about 10% quicker on writes with no difference on reads.
The claims made by manufacturers about the speeds of their devices are mostly [email protected] Additionally, the XDA IIs is much, much slower at reading/writing from the cards than the PC is.
Nigel

Time for a new micro sd card

I'm buying a larger SD card in readiness for Froyo (and I need more room for music!).
I've already filled up the 4GB card that came with the phone. Is it simply a case of copying everything from the 4GB card onto a computer, inserting the new card and copying it all back? Or is there some funky protection scheme in some app data which will break everything?
Also, will Eclair be able to format the new card (it's 32GB)? I think Windows 7 only formats fat32 on smaller drives.
Any information or other peoples experiences would be welcome.
If you just have one 4Gb partition it is safe to copy all the files to the new one and it should work without problems (copy also the hidden files).
For the format, Windows 7 can format it. Not sure if fat32 or exFat, but it can format it for sure.
Remember to buy a class 6 sdcard.
it will be much faster.
Oby One said:
Remember to buy a class 6 sdcard.
it will be much faster.
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Click to collapse
Just wanted to jump in here to clarify this statement. Higher classes means faster write speeds. There are no difference in read speeds.
Therefore...
- Having a higher class card will not result in better performance in tasks like generating thumbnails when viewing photos in your Photo application.
- If your application is installed on your card, higher classes will not mean faster application performance. Again, read speeds are not affected.
- Having a higher class card will mean you will be able to transfer files from your PC to your card faster.
That being said, you should buy the highest class card you can afford. But you should prioritize capacity over speed.
Tip: Pass on class 2 cards. They may start choking when you use your device to record 720p video.
ohyeahar said:
Tip: Pass on class 2 cards. They may start choking when you use your device to record 720p video.
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Zero problems with my Sandisk 16gb Class 2 card. It writes at a sustaining 7.5mb/s, so faster than Class 6 minimums anyway.
Regards,
Dave
Thanks for all the advice guys.
Regarding the class, it has to be class 2 - it's the only thing available in 32GB.
However, as ohyeahar said, it's only write speed. I don't think a 720p stream will be a problem given the benchmarks I've seen for the Sandisk 32GB card. It seems to be writing at 5-7Mb/s so well above the Class 2 minimum.
I'm also buying a new microSDHC card. Should I format it in NTFS or FAT32?
Laban said:
I'm also buying a new microSDHC card. Should I format it in NTFS or FAT32?
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Correct me if I'm wrong but when I format it on my computer, my desire always tells me to do it again anyway on my phone that is
Sent from my HTC Desire using XDA App
lennshow66 said:
Correct me if I'm wrong but when I format it on my computer, my desire always tells me to do it again anyway on my phone that is
Sent from my HTC Desire using XDA App
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Ah, of course! That must be the correct way of doing it. Thinking of buying the Sandisk Mobile Ultra 16GB or the Transcend Class 6 16GB or A-Data Class 6 16GB.
Any recommendations?
Where is everybody looking to get their memory cards from? I'm currently looking for the best deals and struggling to find any decent ones tbh
ohyeahar said:
Just wanted to jump in here to clarify this statement. Higher classes means faster write speeds. There are no difference in read speeds.
Therefore...
- Having a higher class card will not result in better performance in tasks like generating thumbnails when viewing photos in your Photo application.
- If your application is installed on your card, higher classes will not mean faster application performance. Again, read speeds are not affected.
Click to expand...
Click to collapse
Click to expand...
Click to collapse
I think you are not well informed. Higher class cards also offer higher read speeds and that is very important.
In my phone applications are also writing to card so having a higher class card makes all the difference. especially if you are using it with a swap partition.
I don't have the link to the benchmark right now but I will show you tomorrow the different read/write speeds in different class cards
Therefore...
- Having a higher class card will not result in better performance in tasks like generating thumbnails when viewing photos in your Photo application.
Click to expand...
Click to collapse
Yes it will
- If your application is installed on your card, higher classes will not mean faster application performance. Again, read speeds are not affected.
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Click to collapse
yes it will
later edit:
I don't remember exactly the values for read speads but from my tests they were something like this
cls2 15mb/sec
cls4 18mb/sec
cls6 21mb/sec
for me ...speed is everything so class 6 it's my choice
Oby One said:
I think you are not well informed. Higher class cards also offer higher read speeds and that is very important.
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Sorry, but that just isn't the case!
The class of an SD card is purely the minimum sustained write speed that the card will achieve in a completely unfragmented state. It has *nothing* to do with read speeds.
Case to point, here are the benchmarks for two of my MicroSD cards:
16gb Sandisk Class 2
Sequential Read : 20.050 MB/s
Sequential Write : 7.415 MB/s
8gb Transcend Class 6
Sequential Read : 19.938 MB/s
Sequential Write : 15.020 MB/s
Note that the read speeds are almost identical, but the write speed of the class 6 is almost twice the amount. However, the write speed of both cards is well in excess of the class 6 minimums and given that there's far less writing going on than reading, the difference in write speed is practically negligible on the Desire.
Which card do I used in my Desire? The 16gb Class 2 and I experience absolutely no lag whatsoever using my phone, and I'm using Froyo Apps2SD.
Regards,
Dave
Laban said:
I'm also buying a new microSDHC card. Should I format it in NTFS or FAT32?
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Click to collapse
fat32
10 chars
Hmm, maybe because it's a newer generation class 2 card?
perhaps my tests were done with older generation cards that gave out lower speeds.
Now I am curios...I can't wait to get back home and find the tests file.
foxmeister said:
Sorry, but that just isn't the case!
The class of an SD card is purely the minimum sustained write speed that the card will achieve in a completely unfragmented state. It has *nothing* to do with read speeds.
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Click to collapse
Yep, Dave is absolutely right, it's purely minimum sustained write speed for that class. And as you can see, his Class 2 card actually exceeds the class 6 spec for writing and isn't far off from Class 8 performance.
Looking around the web, the 32GB class 2 card I bought has similar performance in the benchmarks I've seen to Dave's Class 2 card. Not only that, the benchmarks are done on a PC. I doubt the phone has the I/O bandwidth to actually hit numbers like those in any kind of sustained way.
ok, my bad.
There is a slight difference between different brands (regarding read speed) but not so big.
regarding write speed .... I think that only if you use your sdcard with a swap partition you will see big differences.

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.
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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?
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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
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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
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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!
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?
Click to expand...
Click to collapse
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.
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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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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:

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