I bought an external hard drive, connected it to my MacBook, put some stuff on it, connected it to a pc, tried to transfer video files to a friend (pc owner), spinning wheel of death, friend pulls out usb without ejecting, connected external drive to my MacBook and nothing pops up. Sometimes it’ll pop up if I restart my MacBook with it plugged in. But there’s a pop up and has three options: initialize, eject, ignore. I click initialize but Disk utility doesn’t find a problem when first aid is used. System Information knows it’s there, plugged in. Both tell me partition map is “not supported” or “unknown” and I don’t know anything about this, but is that where the problem is?
Note: Okay, so I feel like this may be a usb 3.0 to usb 2.0 problem. I still have the same issue where it only shows up on MacBook after restart. But disk utility shows me more on an old MacBook (usb 2.0) than my MacBook (usb 3.0). My external hard drive is a seagate. Some information disk utility gives me is. USB Serial Number is all zeroes. Total capacity is 144.12 PB. Partition Map Scheme is unformatted. I also would prefer if I can fix it on a MacBook. When I tried to verify it said unrecognized file system. The PC I have access to is slow and I don’t really know how to work it.