it was a clearance at a local Vietnamese shop, and it said “2TB (64GB extension)” so I knew what to expect. I scooped it up to prevent a less tech-savvy person from using it and losing 1936 GB of their data. I found that the FirstChip flash controller can be reprogrammed using the software MPtools, which I used to find bad blocks and limit the drive to a virtual 30GiB capacity, which means the drive should be as good as the upper 50 % of blocks. A one-pass R/W test then finished 100% correct but I still only use it for non-critical files like movies.