I recently bought 2 64GB versions from another site. The first worked fine for several weeks, and then it started to become very slow for no reason whatsoever. I've tried reformatting to exFAT, FAT32 and NTFS but it doesn't matter. This hard drive is now so slow that most devices will give up trying to read it. I went to the adata site and tried to get an online restore from a USB drive but the link was invalid. I just opened the second disk and will let you know if I have similar problems. I've had dozens of drives over the years and this may be the slowest ever.
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