In order to transfer a file larger than 4 gigabytes onto this unit you must first reformat it. This true with most flash drives and memory cards not just this one.
A decent product for a decent price. These were required in which to deliver construction project files to the Governing agency for project approval. Nobody wants to give the Govnm't a free anything that you won't ever see again. Therefore these @ $16.00 ea. were the least expensive and worked well enough.
I needed a small capacity USB Flash Drive to create a recovery drive for my Chromebook. I also wanted to start updating my collection of USB Flash Drives to USB 3.2. This device works for me.