SanDisk 3.1 will not password protect Ultra Fit USB
I (there are multiple ways on a MacBook) password protect my memory cards using Apple's software instead of SanDisk SecureAccess or one of the many 3rd party apps out of convenience & theory it will work better on a mac than using a 3rd party service. Until my SanDisk Ultra Fit 3.1 thumb drive, every USB memory card has successfully re-keyed the card to successfully password protect my USB the same way. That way is Disk Utility via means of clicking erase, and choosing one of the, well as of now 3 options with (journaled, encrypted) at the end of the option. With "encrypted" as the last word, it means you must choose a password before it will erase. With the 3.1 thumb drive, the pop-up box to choose a password doesn't appear as with my 3.0 SanDisk USB matching in size and every single other USB memory card I have used. How do you password protect a 3.1 Ultra Fit made by SanDisk using apple's built in software?
I would like to suggest a solution, how do you change the partition map on the APFS system, the proper Apple only map is "GUID Partition Map". The SanDisk's come with a "Master Boot Record" map & I don't know how to change it because since it changed storage management with the APFS, it does not give the option to choose the map. I will try it & let you know if you can tell me how to erase it with Disk Utility while switching it to the "GUID Partition Map", I think it will fix it. If not, does any body have a better idea or any feedback how to password protect my 3.1 Ultra Fit USB drive?
MacBook Air