Help understanding incrementals

Im running Server 2.1.19 on FreeNAS jail and client 2.1.15 on Windows 7.
All values are set to default on the server.
(full file backup every 30 days and incremental every 5 hours)
The PC name is PC1

Im backing up the following folders on the Windows Client:
C:/Users/User1/Documents
C:/Users/User1/Downloads
C:/Users/User1/Desktop
C:/Users/User1/Pictures
C:/Users/User1/Videos

Full backup is 300 MB (as shown on the GUI and by doing “du -Ahs” on /mnt/data/PC1)
I did 3 incremental, and each is 0 MB , shown in the GUI, and shown with “du -Ahs” on /mnt/data/PC1

But I noticed that if I do “du -Ahs” on the actual folders for the incremental (like 170424-2145 or 170424-2245) I get a size indicating there is data there.
I browse on the server via command line to each incremental, and I see data on “/Documents”, all the files are there, on each incremental.
The reason is important is because Im using rsync to take these backups to an offsite server, and the incrementals are making my offsite backups huge and slowing down my transfers.

I tried with several options, disabling symlinks, etc, but I cant seems to find explanation for this and a way to avoid duplicating information on the incrementals.

Not sure what to do next.

Try with -H preserve hardlink, make sure destination support hardlink.


http://www.giannistsakiris.com/2011/04/15/counting-and-listing-hard-links-on-linux/

Other option, is to have the client to backup to two different servers, you can use different retention policies :frequencies and whatnot