📱 Patriot 512GB EP Series A1 / V30 Support microSD Card SDXC: Ideal for Android Smartphones & Tablets with 4K App Optimization - PEF512GEP31MCX Review

Specified for use with 4K video up to 100MB/s read, 80MB/s write. A writing speed of 30 MB/s was specified on the back of the packaging. I put it in my Gopro Hero7 and tried to record a 4K video and got the "Card too slow" error. Obviously these cards had the wrong label. It should read "V30, U3, Class 10, Ai, XC I". But obviously it only delivers up to 30MB/s? Impossible. I'm sending it back to Revain for a refund.

This is the second Patriot card I've bought for my Galaxy S9. This is also the second time it has just stopped working or even registering on my laptop or my phone. It just doesn't register at all. Displays as if no map is present. Worked for a good six months and then lost six months of data. The previous Patriot card I bought lasted a year before this happened. Either way - if you like erasing your data - this card is for you. Especially if you really want something that doesn't work. That…

This is for a 512GB EP Series microSD card. Quality product, totally legal. Patriot has been around for a long time. I copied 280GB of FLAC files to it using the adapter in my Intel NUC and it was able to sustain 60MB/s for the duration of the copy. This is probably the worst case scenario for copying and I've been very happy with the speed. Warmed up while copying, but not much. Nothing I would have worried about. The only downside I can think of is that it's formatted but only 466GB (exFAT)…

This review relates to the Patriot 256 GB A1/V30 Micro SD card. There are many fake chips out there, so we recommend anyone who buys them to download and run the test as soon as you get it. The first tests weren't very good - the read speed was 20 MB/s. I was upset as this would be the second chip I would have to return. (Already returned the Silicon Power Chip). I reformatted the drive and ran the test a few more times with better results, 78MB/s read speed. I also ran some H2testw-1.4 tests…

The Highly Antimated Electronics 512GB card is a legitimate card for several reasons: It has 512GB of usable storage space. I wasn't expecting this, but it's nice. Files written across the entire disk using pseudo-random numbers resulted in consistently high write speeds and zero write errors. Changes or overwritten bytes. The above tests were conducted to combat Flash (f3) cheating on macOS. The same program can be compiled for Linux. You can use h2testw to run similar tests on Windows…