So I am having a problem with my inventory and retainers filling up very quickly. I have most classes unlocked and above lvl 20 except DRK, RDM since that will add more gear I can not carry. I have a lot of WHM gear that I want to keep for glamour and this takes up a lot of my armory space.

In my inventory, I have tons of stuff considered "crafting material" so I do not want to get rid of them. I also have a ton of potions which I rarely use. What should I do with these potions? Sell them? Marketplace? Keep?

My retainers have gear that I will use on my other classes once they level up. They also have all my materia, some crafting stuff, faded music rolls, etc. They also have many dropped things like Unidentified Alligan Tombstones, Plates/Gears/Spring from Alexander, etc. I am not sure if I should keep like these gears/plates/tombstones. My main class is lvl 62 WHM and I have never had problems finding gear. Never had to use the springs and stuff before.

I have been trying to level all my classes to get rid of gear that none will need and trying to level crafting to combine materials and make music rolls, but this takes a long time.

What should I do with these? What should I keep, sell to merchants, or sell on marketplace?