Here’s a reasonably inexpensive Backup drive for you to use on your Mac (or PC if erased). It also comes with the new style USB-C connector AND the older USB connector. I also love that it doesn’t need a power cord, simply connect it and go to Time Machine and choose the drive to backup to.

https://amzn.to/2PsKLiN

WD 2TB My Passport for Mac Portable External Hard Drive for Backup