Mhm... and how do I "check that everything has been copied properly" with powershell? You mean get backup job information and see if backup job returned success? or something else?
Something similar, right. Sort of double check, whether the latest result is success and whether a tape contains at least something.
If I configure 1 copy to store (or whatever its called) will it only do full backups without incremental?
Correct. Backup job configured in whatever mode (reversed/forward), having 1 as retention, and making always full backups.