My instance increases by 1GB per day

hello, on my server on which only Lemmy is running, I don't understand why it fills up space all the time. Every day it increases by about 1GB thus risking reaching the limit after a short time.

It is not the images' fault because there is a size limit for uploading and they are also transformed into .webp.

The docker-compose file is the one from Ansible 0.18.2 with the limits for loggin already in it (max-size 50m, max-file 4).

What could it be? Is there anything in particular that I can check?

Thanks!

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28% - 40G (3 July)
29% - 42G (4 July)
30% - 43G (5 July)
31% - 44G (6 July)
36% - 51G (10 July)
37% - 52G (11 July)
37% - 53G (12 July)
39% - 55G (13 July)
39% - 56G (14 July)