Ritesh_4 71 Posting Pro

Hello
I have a 48.8GB partition, which am backing up using Paragon free edition, and as such, I get the size in use as 33.9GB and backup size as 22.8GB.
I want to know:

1. Does it backup the whole partition or only the 'in-use' part?
2. How can I get the compression ratio or percentage from the above data?

PS. title should read Paragon (instead of aragon)