Should I use Mac OS Extended Journaled?

Here’s a basic rundown of which format we recommend for your USB flash drive, broken down by use case. If you absolutely, positively will only be working with Macs and no other system, ever: Use Mac OS Extended (Journaled). If you need to transfer files larger than 4 GB between Macs and PCs: Use exFAT.

What does journaled mean Mac OS Extended?

A Mac OS Extended volume can be journaled, which means that the operating system keeps a continuous log (journal) of the changes made to the files on the volume.