Be warned that there are lots of sellers out there selling cheap thumb drives without the stated full capacity.
It will state 4gb capacity under ‘properties’, it will allow you to write a full 4gb capacity.
To ensure that, I do meet-ups (at my convenient time/location) and exchange.
How to test if it’s a fake?
Write files to fill up thumb drive.
When opening up the files, certain files will be corrupted and unable to read.
This happens because the manufacturer uses a below 4gb(eg, 1-2gb) thumb drive and “upgrading” it to a “4gb” thumb drive.
How to test if it’s a 4gb Original?
Write files to fill up thumb drive.
All files should read without any problems.
Be Assured Unique N Trendy Sell ONLY FULL 4gb Original Capacity Thumb Drives

