Cannot Erase a 64Gb exFat SD Card with Disk Utility | OS Mojave I've got a microSD card in an SD adaptor that I accidentally left in during the Bootcamp installation and now it is formatted as exFat rather than Fat-32. I tried erasing it and changing the format, but it says:



I looked at a couple pages on here and typed in some console commands but they didn't do anything so I'm writing my own question. Any suggestions are greatly appreciated. Thanks.
Also, here is the info:



EDIT: I think I found out why it won't erase - there is a windows NTFS format inside the disk, named disk2s1.
SD cards frequently have a read-only switch. Perhaps this is on.