Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
This item is a fake. I've encountered others, but this is the first on Amazon.There are others, so beware. It initially reports the proper storage size, then once written to it usually crashes. You can try to reformat it and it will not work. Stick to name brands.
I saw a lot of people report that this Micro SD doesn't report the correct sizes, and I had the same issue. However, I tried the micro SD card in my phone and found that it was in fact 128GB, 115.64GB after reserved. I then tried a few other adapters for my PC and found that the adapter was at fault, not the card itself.
I tried this with a Sandisk SD card and got the same errors until I put it in my working adapter or in my phone.
Speed is decent though you have to keep in mind, something the other reviewers might not know, is that their are a lot of factors that play into the speed of this device. Are you using a USB 2.0 or 3.0 slot? Is your Adapter USB 2.0 or 3.0 compatible? What files are you transferring? For me when I transferred 25GB worth of files its speed was a consistent 10MB/s (With spikes) over a USB 2.0 adapter in a USB 3.0 slot which is generally what the lower speed rated cards should do.
So if the card isn't reporting its full size, try your phone or a different adapter. The cheap adapters I was using were able to report accurate sizes for 32GB or under but for cards 64GB and higher it caused problems. Also don't just run a benchmark and determine that's the speed of the card. Different files impact performance and USB versions impact performance and a benchmark doesn't substitute actually using the device to determine its speed.
Buyer beware! The first one I received was formatted to 21.75GB in my Motorola Moto G6. The replacement, I inserted into my Windows 10 PC and viewed with Disk Management. It also showed 21.75 GB and I didn't even bother formatting it. Moving on to a different brand/seller. Maybe a fake, but... Free Returns, but a hassle nonetheless.
I got the 128GB card was worried about some other reviews saying the capacity is fake, so I did a test - transferred about 110 GB video files to the card and tested the videos are playable, no problem. I then format the card using my camera, it is used for 4k video shooting and pictures in RAW format. So far so good.
After a few weeks, nothing recognizes it. My GoPro, my other GoPro, my FatShark goggles, my card reader for iMac, etc. Nothing will read it. I wrote manufacturer on here and no response. It has been about a week since then. Please just buy a Samsung chip and be done with it!
I liked everything about it except that it died in my phone after a few weeks of use. I mean completely dead as in you can't even connect it to a PC and still see it just completely dead its almost mind boggling how unreliable it was.
Bought last week to moveall of my photos, music and data to since my internal memory on my Samsung Galaxy was full. Transfered the data the way I have done many times moving it in the phone file explorer from internal memory to SD card. Not even a week later and it is all gone from the card - no where to be found. Lost all of the photos from our 2 week vacation to Europe which were luckily backed up on the cloud. Spend the extra $7 and get a Samsung or Scandisk - this is complete garbage!
Like others here worked for a couple weeks in my phone then poof! doesn't even show up as storage anymore. Lost over a thousand downloads from YouTube, first said videos didn't exist then card disappeared altogether. Gonna stick with name brands, a few more dollars but at least no worries. Luckily all my photos from camera are backed up in multiple cloud accounts, computer backup and original 32gb card that I swapped out for this junk. Buyer beware, it's not worth saving a few bucks.