But USB sticks don't have to be formatted by the Brennan before use! First of all, most USB sticks come already formatted to FAT32, and work as-is, right out of the plastic wrap. Second of all, if you do reformat them, just make sure that you use the correct format -- i.e., the only one that works, FAT32.
Granted, MS-Windows hasn't liked formatting anything bigger than 32GB to FAT32 for quite a while now, and the Mac has complicated things by supporting exFAT in the last few versions of OS-X -- but as Jerry Pournelle used to say, either understand your (computer) tools or pay someone who does. Just because some marketing idiot (sorry about the redundancy) claims that you can be an instant expert without ever having to learn anything doesn't make it true.
As to hard drives, well, there is a likelihood that you are using something bigger than 32GB, and HDs usually don't come formatted as FAT32 these days. (It's actually a pretty inefficient file system for a 2TB drive.) You can always (a) boot a Linux distro from a CD or USB stick and use gparted, or (b) use the PowerShell command line (see
https://www.maketecheasier.com/format-drive-fat32-windows10/), or (c) use a third-party utility (some are mentioned at that URL). The MAC should do it, too, in DriveUtility, if you are careful about picking the right options.
While the B2 will do the format for you, and for some people that might be the easiest option, it is by no means the only way, so no one should say it is.