I would like to rsync my data to a remote destination. The data amount is relatively large considering the network transfer speed, so if I use rsync, it will take a long time to complete the first backup. When the first time sync is completed, the data will not be changed so much every time, so rsync can completed the sync in a short time by transferring the changed part only.
I can easily copy the whole data to an external backup device, say, a portable hard disk drive, and take the hard drive to the destination server, and copy the data to the server.
Now I am thinking if I can copy data to the destination first using my hard drive, and then using rsync to only sync the changed part. I have tried, but it seems that rsync still trying to transfer the whole data in the first time? I am not sure if anyone can have a solution on this or has experiences on this. Thanks in advance.