This may not be a FreedomBox issue but hopefully someone here will have some advice.
My dad sent me the same jpg via email and via Matrix. I downloaded both copies. The emailed one was 4032x3024 pixels and 3.4MB. The one from Matrix was 1008x756 pixels and 192KB. As a test, I uploaded both images to Matrix and redownloaded them. They both came back exactly the same as they were when I uploaded them.
I’m running a Matrix server on FreedomBox running on an Olimex Lime2. I log in with Nheko on a Debian PC. My dad logs in with Element on an Android smartphone.
Why is the file size only reduced for my dad on Matrix? Is there a setting I can change to allow him to upload files of (almost) any size?