2 USB Harddisks

[scmoh]

Hi,

Currently, using Arc-serve backup r11.5 and with one USB external hard disk to backup 5 weekdays job.
Because of the capacity of the USB hard disk, every Monday need to change the usb external hard disk (total of 4 usb hard disk for a month).

is there a way for Arc-serve to backup to USB hard disk A (for a week) and then (the second week) backup to usb hard disk B?
Then repeat hard disk C and hard disk D (for the third and fourth week), and of course, not sure for the fifth week.

need your advise and help, please.

Thank you.
With regards,
SC Moh