Disk genius yay or nay? : r techsupport - Reddit Just wanted to back up my gfs old Mac before wiping onto my trusty 1 TB external HDD (ExFAT) Time machine (the mac backup software) ofc wanted to wipe the entire disk before backup The mac didn't want to partition presumably due to old age Went to partition on Windows however can't shrink volume on an ExFAT disk Now using DiskGenius