Hello,
I wanted to bring attention to how much space is currently being taken by materials from all of the different content we currently have, and possibly suggest a solution to help with that.
Bank image example. Not counting the unusual number of souls/sparkle stacks, there's about 4-5 rows full of materials.
Other X-Legend games offer a material bank, which have separate bag slots and everything, and functions account-wide. I understand this may not be possible, so another option could possibly be the archive. There are already items in the archive that allow you to deposit stacks (example, Organic Juice stacks up to 100 in archive.)
One valid argument to this is it's too beneficial for a player with multiple alts on one account, and will allow them to progress one character too quickly. A compromise to this could be only allowing untradeable items from older content (such as HoO, old Abyss, Sky Tower to Daylight Forest, etc.) to be added, while allowing tradeable things from newer content such AT/DF essences, Deep Abyss essences. I guess this would also somewhat function as a possible catch up mechanic for those forms of content, though definitely would not be the majority use for it.
This could also work for Reality potions, which aren't used in any new content anymore, stones, scrolls, etc. Probably a lot more possibilities as well. Would be nice to have though, and frees up a lot of space for other things.
Thanks!