Bought 3 units of 32GB. Windows recognized 32GB of free space and was able to write an 8GB file, but I found the write speed to be very slow. When formatted for use on a Linux system only 4GB was available, it was switched back to Windows and reformatted with NTFS and couldn't get more than 4GB. All three devices behave exactly the same. I think they use some kind of hard drive to "mask" 32GB of storage and use high compression software on the data. I wouldn't recommend it, waste of time trying to figure out why the data couldn't be written.
Titan Gray Samsung BAR Plus 256GB USB 3.1 Flash Drive (MUF-256BE4/AM) with Up to 400MB/s Transfer Speed
69 Review
Kingston DataTraveler flash drive 100 G3 256 GB, 1 pc. black
74 Review
Kingston DataTraveler SE9 32GB USB 2.0 Flash Drive for Reliable Data Storage (DTSE9H/32GBZ)
69 Review
32GB SanDisk USB Flash Drive (SDCZ430-032G-A46)
78 Review
2 TB External HDD Western Digital WD Elements Portable (WDBU), USB 3.0, black
84 Review
18 TB External HDD Western Digital WD Elements Desktop, USB 3.0, black
95 Review
8TB Seagate Backup Plus Hub Desktop Hard Drive with Data Recovery Services
56 Review
π Seagate Expansion 3TB Portable USB 3.0 External Hard Drive (STEA3000400) in Black
60 Review