What is the best way to back up a project with a lot of content?

Question

Backup

There is a website on Wordpress, it is hosted and takes about 20 GB (mostly pictures). You need to back it up regularly. I think to backup to the space from Selectel, plus periodically download to the local machine.
I don’t really want to archive every time, because. then you need to have a more capacious disk on the server, and this is extra money. In addition, ideally, you want to have incremental backups - i.e. copy the entire folder once, and then send only the latest changes.
Please tell me the best way to solve the problem?
Thank you.

Answer 1

You can archive directly in a stream and send the archive to a remote machine
You can pour it on S3
You can sshfs
You can rsync
Archiving images with compression is a rather useless exercise

Answer 2

In addition, ideally, you want to have incremental backups - i.e. copy the entire folder once, and then send only the latest changes.

There are many different ways.
Here is one of them - zpaq
- compression, deduplication, increments.
And what is very useful and not everyone has it is an index file of available blocks.
That is, you have a two-terabyte archive somewhere far away, and an index file of this archive with a size of ten megabytes lies next to the data, and a compressed, deduplicated increment is formed from it.

Answer 3

For data deduplication - bup , Borg Backup