Specify the destination folder on an external USB hard drive

Do not use "usb" as your destination. Do this instead:

System tab:
Click Settings. Click Services. Make sure RSYNC is enabled.

Shares tab:
Click on your source share (Documents), click Settings, click Network Access, click RSYNC, turn it on (default access can be read-only or read/write), click OK.
Click on your destination share (USB back right), Click Settings, click Network Access, click RSYNC, turn it on, make sure default access is read/write, click OK.

Backup tab:
Create a new backup job. Set the source to the Documents share, as you did before.
For the destination, set the parameters as follows:
Type: remote
Name: remote: Rsync Server
Host: [name of your NAS]
Path: [name of your USB drive]/[destination folder] (example: USB2_HDD/backup) (do not include any leading or trailing slashes; you might have to manually create the destination folder first)

fastfwd wrote:

Do not use "usb" as your destination. Do this instead: System tab: Click Settings. Click Services. Make sure RSYNC is enabled. Shares tab: Click on your source share (Documents), click Settings, click Network Access, click RSYNC, turn it on (default access can be read-only or read/write), click OK. Click on your destination share (USB back right), Click Settings, click Network Access, click RSYNC, turn it on, make sure default access is read/write, click OK. Backup tab: Create a new backup job. Set the source to the Documents share, as you did before. For the destination, set the parameters as follows: Type: remote Name: remote: Rsync Server Host: [name of your NAS] Path: [name of your USB drive]/[destination folder] (example: USB2_HDD/backup) (do not include any leading or trailing slashes; you might have to manually create the destination folder first)

Thank you so much, I'll give this a try.

Note that you can also do it by setting the backup destination to "share: [name of USB drive]" rather than "USB back right"... But while that WILL allow you to specify a destination path, it WILL NOT allow you to exclude directories (like the data/.share snapshot directory) or allow you to set the source to an entire volume. Rsync allows you to do both of those things (and more), which is why I recommend using it for all backup jobs.