Use old iMac for backup?
Can I use my old iMac as my Time Machine back up disc? My old iMac is mid 2011 with 250GB SSD ( TS256C?). New iMac is 2019 running macOS Big Sur version 11.2.3 with 1TB SSD and I am using around 100GB on it currently. If so can I use a thunderbolt connection presuming old one is thunderbolt 2 and new one thunderbolt 3?