hello, i was looking at ssd's on ebay and i saw up to 16tb external ssd's for under $50 and was wondering what i'm missing or how it can be possible they are so cheap? here is a title of one "1Pcs 3.1 High Speed Solid State 4/8/16TB Mobile External SSD Hard Drive Disk USB" ... i would be surprised finding even a non ssd external hd being so cheap, thanks