Clarity of interface before and during a backup

Hello,

I created and performed a full backup of my files 3 months ago, totaling 593GB, on an IR_GLACIER storage space with AWS.

Today, I want to perform the 2nd synchronization (backup) of my local files with the external storage space.

With the new interface, the backup statistics show 647GB locally, which should mean approximately 30GB of additional files to back up.

Question 1: Why does it indicate that it is backing up 647GB instead of showing the 30GB difference when the backup is running ?

Question 2: The file sizes are not the same between the new and old interfaces. Why is this?

Question 3 : Why Duplicati doesn’t show the list of files to backup ? (ie. like FreeFileSync does)

Thank you in advance, Jacques

Duplicati is a backup solution providing versioning and deduplication.
Actually, a full backup is performed every time a backup task starts. Data blocks that already exist at the backend, will not be re-uploaded, resulting in uploading only new and changed data tot the backup target.

So the answer to question 1 is: The backup size is 647 GB, but only 30 GB will actually be sent to the remote destination.

Answer to question 3: All source files are backed up, but upload of unchanged data is skipped.