****** - Verified Buyer
4.5
I have tested quite a few SD cards and this was my first 512GB card. The card tested well with an average write speed of 51MB/s and an average read speed of 79MB/s using the built-in SD card reader on my Lenovo laptop that's less than a year old. On my Galaxy Note 9, I got an average of 53MB/s write and 83MB/s read speeds. The advertised speeds are read/write 100MB/s and 80MB/s, respectively, according to the specifications on SP website. I performed a test of the capacity. Windows recognized the full capacity at 479GB formatted. Android recognized it as 468.5GB formatted with the built-in formatter on Android 9. I used a program in Windows to write every sector on the disk. There were 0 errors and the full capacity came in at 479723.99GB. I call this a win for this card. I was a little skeptical as I have purchased name brand MicroSD cards and they've been fakes. This time, I went the manufacturers website and their own "Where to Buy" link directed me to this card. Will definitely buy one again. Time will tell on the longevity of the card but a 5 year warranty makes me feel a little better about it.
