Transcend TS128GUSD300S 128GB | microSDXC I, U3, V30, A1 microSD 95/40 MB/s

This is a superficial breakdown of 30 minutes spent with the card, so take it with a grain of salt.Using it with an adapter into a laptop equipped with a decent SSD, you can expect write speeds that constantly dip as low as 9-10 MB/s and go upwards to 28 MB/s. Read speeds usually sit in the high 20s. Haven't tested it straight into a device, so speeds might improve, as shown by another customer with pictures (70+ mb).As for the capacity, as I see this argument popping up over and over again, please educate yourself why the advertised capacity by the manufacturer is different than the one showed by your computer. A simple google search will give you multiple articles regarding this.For all intents and purposes storage is calculated as you would weight, distance etc, by adding zeros to the end.so 1 Gigabyte (GB) = 1,000 megabytes (MB) etc.However due to how computers work, they will not show these values, but instead:1 Gigabyte (GB) = 1,024 megabytes etcThe bigger the drive is, the more capacity is "lost" in the listing of your device.128 gb = 1,099,511,627,776 bit1,099,511,627,776 bit = 137,438,953,472 byte137,438,953,472 byte = 134,217,728 kilobyte134,217,728 kilobyte = 131,072 megabyte131,072 megabyte = 128 gigabyteI made a quick calculation (which could be slightly incorrect, failed math):The amount you "lose" is as fallows:Gigabyte difference = 73,741,824 bytesSince per GB your are "losing" 73,741,824 bytes, then 73,741,824 bytes x 128 GB = 9,438,953,472 bytes, which converted to GB equals: 8.79071 GB (as shown in the picture).Windows machine shows 117 but if we add the "missing" 8.7gb = 125.7, which is closer to the advertised capacity.Also this might be true for write/read speeds as well, and the actual product does not advertise 95MB/s, rather "up to" which is correct.Does the job, but I would use it for complex write and read situations. Only really useful for mobiles and other hand held devices.

This Transcend card gives satisfactory performance, I think.I use it in the microSD slot of my Surface Pro 6 to provide bulk storage.Please see the attached benchmark photos.In my testing, it gave slower write speeds when formatted as NTFS (vs exFAT), but I think it is still OK.Random access R/W speeds are not too bad, better than a HDD of a few years ago.For GBP 14.95, 128 GB, it's OK.Only four stars because it does not achieve the advertised 95 MB/s read speed.

Absolutely gutted, started transferring photos from my mobile to the card and it just stopped, already transferred all of my photos and was just finishing off with my music and video files.The card became corrupt and lost all of my files, not bothered about my music too much but my photos of my holiday and daughters prom are gone for good.Will be looking to return this once I have had my IT friend look to see if anything can be recovered 😭

Bought a couple of these for Victure Security Outdoor Cameras, that record with audio at 1080p (don't know bitrate, sorry). Following formatting in the camera, they seem to work. I am not running them with full-time recording but with motion detection, which hopefully should avoid the cards wearing out too soon – which is a real concern with these less-expensive cards.If I run into any problems I'll update this review.Simple, basic packaging with no wasted SD card adaptor provided, as with some other micro-SD cards.

I got a pair of these for a couple of Tablets. I read that they might need reformatting to get the max capacity but I didn't have any issue with them at all showed up as 118GB storage available. I think that's pretty common to loose some of the space with rounding fo bytes off to GB. Next day delivery was spot on!