Unfortunately Stick does not work flawlessly

I bought the stick due to the recession and the favorable price.
Unfortunately, the drive does not operate correctly.
As mentioned in other Reszessionen, it offers only 29 GB capacity instead of the 32GB specified by the manufacturer. So I would, however, be able to live without problems.
However, can be described only approximately 2/3 of the storage space. All other files that I copy on the floor, are defective and can no longer be read.
I'll return the stick.