Hacking SD Card Problem During CFW Install Process

[8bitsenpai]

So I've been following this excellent guide to get my brand new N3DS a nice CFW and such ( https://github.com/Plailect/Guide/wiki ) and most of the way through, right when I was about to backup my sysNAND in OTPHelper after backing up my EmuNAND, it said I needed more space on my SD card. Now, I'm using a Mac through this process and I've had trouble in the past with taking things off SD cards and the space not updating correctly, so I figured erasing the SD card and loading everything back onto it would fix the issue (which it did), but now my N3DS is saying it can't read the microSD card and all that. is there any easy solution here or is it looking like I'll have to start from square one again?