> (1) how much space my data will take up after compression and deduplication In my experience, deduplication typically doesn't do much for the first backup. F

> (1) how much space my data will take up after compression and deduplication In my experience, deduplication typically doesn't do much for the first backup. Further backups take approximately as much space as usual incremental backups. So the answer to this is "as much space as your existing backup". > (2) how much bandwidth my incremental backups will need I recently looked into this and for me the cost of bandwidth used for daily backups is about 10-15% of the cost of data storage.