Backup solutions for Synology NAS

Hello. We're not familiar with Synology's NAS apps so we ask you for help with choose best one because Synology offers many apps for backup. What we expect from backup:

• Backup to the external USB drive

• The external USB drive can be encrypted

• Possibility to recovery from Windows device ) (in case of NAS damage, we don't want to wait until NAS will return)

• Access to data on the USB device (In case of NAS damage)

Synology has a lot of apps for backup, as on a screen below, but as I said we are not sure which from them fulfil our requirements.
Can you advise us about these apps? Or warning if some of them making problems.