Submitting Massive Amounts of Textures?

[Warechu]

I've been wondering, how exactly are textures submitted on the Texture Resource? I've heard some people talking about sheets, but what exactly does that mean? Also is there any special format the textures need to be in? Or can they be left how they are in the source game? I don't think what I'm doing would be possible to do with sheets though, as I'm wanting to upload every single texture from Dark Souls 3 and the game has probably 25000 textures (estimate), and I don't want to murder an admin's eyes having to look through them all. Also I'm not sure I can sort that many files, so I'm wondering what to even do with the files at this point. I think it's frankly too big of an order and Q/A on something this size would be near impossible, but I really want to make the textures available to those who want to mod the texture files.