How to reformat a USB to not be a bootable operating system I recently created a bootable USB from a .img file, here's what the USB looks like:



And this is what it looks like in Disk Utility:




Is there a way to reformat this USB to just store files?
If you insert the USB drive, launch Disk utility and select the USB drive on the left side of the Disk Utility window you should now be able to operate on it.

Personally I would select Partition and then the number of partitions you want. Then apply it.

That should do it