Here we go, step by step.
1. Plug in the drivestation axis to the linkstation
2. The Linkstation automatically creates a share folder for a USB drive called USBDisk1.
3. You need to go to the shared folders tab and edit all 5 of your shares (or any shares that you want to back up) to have disk backup checked under folder support.
4. Go to the system tab, storage and then click on the USB disk and choose format. If the size is 2TB and above make sure you check GTP disk.
5. Once the format is complete you will need to go back to the shared folders tab and click on the USBDisk1 share folder and make sure that disk back up is checked.
6. Go to system, then backup and create a new job.
7. Choose any options that you want for your backup
8. To add the folders you have to click the add button. A window will appear with the source folders on the left and the destination folders on the right. Give this window some time. I have seen it take 5 minutes to load due to the number of folders. Add the folders that are on the Linkstation on the left and then add the USBDisk1 share folder on the right.
9. Apply your backup settings and that should be it.