It should be 256 GB. I could upload a small file to it, but not a 21GB file. I received an error message that the target disk is too small. But when I check the drive properties, it shows 249 GB free. Something is wrong with the hard drive. I've tried this on multiple USB ports. I even tried restarting my computer. It didn't help. Something is wrong with the drive. That's probably why it was packaged that way. I am returning this POS. Do not buy if in manufacturer's packaging!
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