And many understand it and are happy to pay less to get a card which is fast enough for them. I.e. my chromebook has a (****) card reader which tops out on 10MB/s anyway and i would like to put some movies or stuff on it so for me it doesn't matter at all.

Also if you have dual slot camera you can use this card as a backup or something.

I believe that if you need the speed of it for dlsr, 4k video, or recording raw images at crazy speeds you would know about it and simply buy a professional card which this is not, nor is it pretending to be.

To use in a phone for media, or even some apps this is plenty fast enough.

That said if you wait long enough you can probably pick up the sandisk equivalent which has something like 70-80MB/s read and 20-30 write for same price. But then this is not available now and this is...

All cards I have used so far.

U1 Micro SD:

7dayshop C10 64GB, 29/73 MB/s. write/read.

Samsung Evo Plus 128GB 24/75 MB/s,

Sandisk Ultra 80MB/s version: 20/82 MB/s

Samsung C10 64GB 20/43 MB/s.

Kingston C10 64GB, 15/42 MB/s.

Sandisk Ultra C10 64GB, 9 or 10/?? MB/s. Returned as not reached class 10 minimum speed.






U3 Micro cards speeds which I used:

Sandisk Extreme 64GB, 55/70 MB/s, write/read.

Lexar 633x UHS-I U1 64G (it is only U1, but have U3 performance), 47/93 MB/s.

Kingston 64GB, 74/93 MB/s.

Integral UltimaPro X MicroSD UHS-I U3 64G, 65/77 MB/s.

When it comes to random speeds, Sandisk Extreme is the best. Its random write speed is few times faster than the other 3 cards.

Is this not better? Integral 128GB for £24.69 (up to 80MB/s read)
http://www.mymemory.co.uk/Micro-SDXC/Integral/Integral-128GB-Micro-SDXC-Card-For-Smartphone-and-Tablet-UHS-I-U1---80MB_s

I see, cheers mate!!

64GB actually give you around 59.6GB.

If you have few GB left, should be fine to run tests.

Your contents will not be affected.

Many thanks!, I meant that I have never tried to measure my SD cards speed, so not sure if I can do it now that I'm already using them without affecting the content that's saved inside?

For example, the micro SD card that I've got in my mobile is 64GB but I'm already using something like 60GB, just a few GB extra free. Could I use any of those tools to measure its performance without losing anything?
or would those programmes delete/format my SD card for checking its speed? (in which case I guess that information can just realistically be retrieved with a brand new card, not after a few months of usage as you won't want lose anything...)

For SSD, I use AS SSD Benchmark.

For SD and Micro SD cards, I use ATTO Disk Benchmark and CrystalDiskMark.

Do not quite understand your 2nd questions.

The card brand new should be formatted as exFAT. It can be recognised by smartphones, tablets, Windows computers.

I do not understand how you get it full of data. If you format, the data will be lost.

All cards I have used so far.

U1 Micro SD:

7dayshop C10 64GB, 29/73 MB/s. write/read.

Samsung Evo Plus 128GB 24/75 MB/s,

Sandisk Ultra 80MB/s version: 20/82 MB/s

Samsung C10 64GB 20/43 MB/s.

Kingston C10 64GB, 15/42 MB/s.

Sandisk Ultra C10 64GB, 9 or 10/?? MB/s. Returned as not reached class 10 minimum speed.






U3 Micro cards speeds which I used:

Sandisk Extreme 64GB, 55/70 MB/s, write/read.

Lexar 633x UHS-I U1 64G (it is only U1, but have U3 performance), 47/93 MB/s.

Kingston 64GB, 74/93 MB/s.

Integral UltimaPro X MicroSD UHS-I U3 64G, 65/77 MB/s.

When it comes to random speeds, Sandisk Extreme is the best. Its random write speed is few times faster than the other 3 cards.

price seems to be constantly changing, as for me now it's £39.48.
I expired it as it was gone up to £37.10 originally.

Expiring, as price has increased to £37.10

Has anyone tried using this with a GoPro - is it fast enough?
Thanks

Cheers, needed one for my DAP but was unsure about the cheaper Integral one posted earlier. Speed not important for my use, just capacity as my 64 GB has about 100mb left for a queue of FLAC and hi res files I'm trying to squeeze on.

Could someone use Crystal Diskmark test the small files ,4 k write and read speed please? I am looking for SD that can do about 2 MB/s speed for these small system files for use in tablets, smartphone and laptops.

Thanks, should be a great upgrade for Nvidia Shield tv, since I bought the tiny 16gb version (Marshmallow allows to use it as internal storage), woo hoo

I remember paying £300 for a 16mb stick to play Doom on a 486 dx2 66 about 1996 i think! hmm things have changed.. looks like the Terminator films may be right! quick throw Arnie in the molten steel...

If you have a 4k camcorder, card write speed becomes critical.

Wow... I remember paying £49.99 for a 64MB memory card back in the day... (about 16 years ago lol)

I don't know a great deal about write speeds on cards but I have this exact model and it writes just under 650 mb a minute (large file sizes anyway) on my laptop. Plenty enough for most I'd expect.

UHS is the hardware interface standard - says nothing about speed other the maximum the interface can support.

The 1 in the U means it is class 1 and supports continuous writing at 10MB/s (the continuous bit being important for recording video). The only other class I have seen is 3 which means 30MB/s (implying it is OK for 4k video recording).


Yes unless you like/trust Toshiba more than Integral.

Amazon also have a Patriot LX one for £29.99, up to 70MB/s read and 20MB/s write, 5 year warranty, so worth shopping around a bit.

Is this not better? Integral 128GB for £24.69 (up to 80MB/s read)
http://www.mymemory.co.uk/Micro-SDXC/Integral/Integral-128GB-Micro-SDXC-Card-For-Smartphone-and-Tablet-UHS-I-U1---80MB_s

Hmmm, 5 years warranty sounds appealing. Anyone have experience with Toshiba warranty?

HEAT!

I am using a UHS1 card (sandisk) on my phone, I did not find the performance overtly restrictive. works fine. looks like a good find. well done.

hot price though. interesting feedback on write might not make it good enough for my asus t100? i have a 32 gb now i think but not sure what write speed is.

Many avoid saying the write because a) its slow and b) many don't understand how important it is ..

Read speed is quite slow for 128gb. They didn't even tell us about write speed, that mean only one thing...it got crappy write speed.