The drive stays plugged in
If the backup disk is always connected, ransomware can encrypt that copy as well as the server.
A backup is only real if you can restore it
A “backup completed” message is a copy, not a file you can open. Essential, from RM4,500 a month, includes a restore test of that backup.
Three ways a backup fails on the day you need it
Nobody has opened a restored file
The job can say success for months while the file is empty, or the accounts database was never included.
The only copy is in the same building
A fire, a flood, or a theft takes the server and the backup together.