Byte-level incremental replication is very useful feature that enables very fast backups of your data.

First time all data will be transferred completely - the next replication checks the checksum of the data and copies just the changed bytes of the file.

Example : if you have an exel file of 10 MB size and you only change one single entry ...

euroNAS will just transfer the changed bytes of your exel file (just few kilobytes) and will not copy the whole 10 MB accross the network.

This saves a lot of bandwith and increases the backup speed.

Of course the backup file is still identical to the original file.