Hi Robert, I think the answer on the question of how much can fit on the tape using TurboStore and Compression is that the compression factor is 4.1 : 1 if I remember correctly. Also you didn't mention what length of tape you are planning to use. This will affect your number of tapes needed tremendously. Note: I am figuring you will use the largest possible tapes :) I use 90 m tapes for my weekly, monthly and yearly full backups. 60 m tapes for daily partials. Art Bahrs >>> Robert Wu <[log in to unmask]> 05/01/97 01:02pm >>> We'll have a total of 8 GB. Will a 4 GB DAT drive cover this if we're using Turbostore and compression?