The 630 and 830 are very similar. It may work as an external device but seem to remember that they changed the type of connection the HD uses between the 630 and 830. If it does work you will lose all the contents on the drive when it is formatted for the 630. Drives get associated with the receiver and if there is anything on them they get wiped once hitched to the new receiver. You may even have to format the drive with another device first removing the initial Shaw format so that the 630 doesn't hiccup over the fact it looks like a mismatched HD.