Restore partitioned drive to old data
I'm probably not asking the question properly, please forgive me.
Just bought a new MacBook Pro. Time Machine prompted me to set up backups. It's late, without reading properly I hit 'ok' and instead of it backing up to my Time Capsule, it started to partition an external hard drive full of family photos.
I yanked out the cable (yeah I know) to stop it. The drive is readable and formattable, but First Aid won't fix it and I can't mount it. It recommends I back up the data from the drive, but I'm struggling to see how I can access anything on it. I have the option to create a disk image still - might that help in some way? it wants to make a 2 TB image which means buying a new hard drive if I'm to move the contents anywhere, but if there's a way to go in, pull out what data I can, and format the rest, I'd be happy. Even if not by using anything built in, recommended software would be appreciated too.
Any help much appreciated.