I would have to agree with Bert on the above post. That would be the way to go. Not only would you be able to take it home with you, but the other benefit to having this is your not over loading a computer in your office with all of your data, but if you are not looking to spend money on extra equipment what I would suggest is to exclude your imported items in your backup. This will speed up your backup time significantly. Your database itself is not that large and it is already compressed. The imported items are not and the backup utility has to compress it, this can take a very long time if your imported items folder is, for example, 10+ gbs in size. However, not backing up your imported items would not be wise. What I recommend you do is to backup your imported items at an interval that you feel is appropriate. You don't even have to include it in your backup. Just make a copy of the folder and place it somewhere. The imported items folder is not part of your SQL database, therefore you can just copy and paste it without disturbing SQL.
Joe