For years, I have been using an IDE Travan tape for backup. I detailed the advantages of removable media like tape and how to use it under Linux in another article.
However, the choice of tape drives and tape cartridges for a home office environemnt are rather limited. The media is expensive, and the drives are also expensive.
My Seagate IDE Travan drive is capable of backing up 10GB, and 20GB with compression. This was satisfactory for years, until I got a 4 megapixel camera, and disk usage started to go up. I had to split the backup into two tapes, one for the pictures directory, and another for everything else.