Typically, the following error message:

Destination error: Could not find a part of the path 'y:\1'.
Trying again...
Destination error: #[DST-1:1001#103] Failed to connect to the Folder destination. > Failed to create folder "y:\1". > Could not find a part of the path 'y:\1'.

occurs when a mapped drive is used as a backup destination on the “Local/Network folder/NAS Settings” window in the “Store backups in selected destinations” section.

To resolve the issue, please specify the full path to the destination folder. Note that if you use a network folder, please make sure you specify the login and password.

This issue may also occur due to a lack of permissions for a user under whom a backup job is run. Please ensure that there are enough permissions.