Backup and Restore to network?

Requests
8

yes indeed the backup location needs to be capable allow Linux permissions. You could using NFS on your Synology. On my test it was working well.

https://www.synology.com/en-global/knowledgebase/DSM/tutorial/File_Sharing/How_to_access_files_on_Synology_NAS_within_the_local_network_NFS

 DietPi-Backup
─────────────────────────────────────────────────────
 Mode: Backup

[  OK  ] DietPi-Backup | DietPi-Userdata validation: /mnt/dietpi_userdata
[ SUB1 ] DietPi-Services > stop
[  OK  ] DietPi-Services | stop : cron
[  OK  ] DietPi-Backup | Free space check: path=/mnt/nfs_client/data | available=2145406 MiB | required=3208 MiB
[ INFO ] DietPi-Backup | Backup to /mnt/nfs_client in progress, please wait...
sending incremental file list
    631,840,097  98%    1.36MB/s    0:07:23 (xfr#17866, to-chk=0/23106)

sent 633,288,016 bytes  received 371,441 bytes  1,412,841.60 bytes/sec
total size is 643,018,702  speedup is 1.01
[  OK  ] DietPi-Backup: Backup | Completed