Best practice about backups

Hello,

just I'd like to get a suggestion regarding right procedure.

I'm evaluating Acronis True Image Server Enterprise Server v 8.912 and I'd like to create automated procedures for each workstations' backup.

I created a task which stores backups to a file server onto our network. Since the backups will grow daily, I prefere to store backups by splitting each 100MB for letting me to store on tapes or dvds the splitted files.
After saving the splitted files on tapes, each 20GB, I'd like to delete these files from the network drive in order to free space for letting TI to store new incremental backups.

I'm wondering how TI tracks the increments if I remove all splitted files from network drive: is there anything I'm missing in this procedure?

Thanks for your support.