its full and i idk what to to toss im like i may need that to craft something you dont know that

Since I don't know how far into the game you are, I'll just give a general guide. This can mainly be dealt with in 2 ways:

1. Increase space by:
-Purchasing Storage Expansion from shop by 50 at 80 OC a pop (up to 4 times I think).
-Increasing Shizuka's friendship level at intervals 7, 10, 13, 18, 21, 25. At level 25 inventory space is 270.
-Have multiple level 100+ characters on the same account. Each additional character will add 30 additional storage.

2. Remove/use items in existing storage:
-Use friendship items when you get them.
-Keep a limited type of HP/SP restorative items that you use. You can eventually buy all types from Miroku.
-Do not keep too many types of unidentified weapons. When you continuously go through different dungeons, they tend to add up. Identify them and give to your SP partner, sell, or use them for enhancing weapons. Keep Kagehide and Amidahijiri for titles if you need them.
-Use all recipes, get rid of multiples.
-Trade common drops at Point Daruma. The white coloured ones are generally easier to get than the blue ones. But do take note of how common the monsters that drop them are and also how easily accessible they are. Things like Daruma Fragments are easily obtainable.

Good luck.