Reformatting SD card - Permissions Denied


macrumors newbie
Original poster
Oct 24, 2017

I am trying to put music on there new micro SDs I bought yesterday, but it won't let me. I read online that I should reformat them with Disk Utility, so I did and it worked with one of them but won't work on the other. I checked the permissions lock on the SD card converter and is is unlocked. I'm not sure what to do next, it still won't let me do anything with the SD card and says it is 'read only'.