Restoring files from a Time Machine backup
Luckily there a few Apple approved Time Machine backup options sans Time Capsule. Apple's termination of the AirPort series puts some users in a lurch over how they will be continuing to back up their Macs using Time Machine when Time Capsule is no more.
Select the disk to install the Time Machine backup. Select your Time Machine backup disk and then the date and time of the backup you want to restore. In the macOS Utilities window, click Restore From Time Machine Backup.