Is there any way to upload multiple files at once?
This deviantart user here, creates quite good hypnosis themed comics. There is one I would like to upload here, but it is 25 pages long. I think that is very exhausting to upload, tag and post each page, one by one.

https://www.deviantart.com/chainedknee/gallery/

Is there any way to make things quicker? Thanks.
As far as I know? No. But if you plan on uploading a 25 page long comic however, please remember to create a pool and hide images 4-25 (since it's against the rules to mass upload like that)
If you already knew to do that, then sorry for giving you information you already knew