Easy tips for inventory management:

• sort everything you want to have permenantly to the bottom
• use one bag display option
• put invisible bags at the bottom to protect your permanent stuff
• keep a stack for each unidentified item at the bottom
• unpack those regularly when space is available (keep one to save the slot)
• salvage via “salvage all X” option
• process or sell overflowing material storage
• sort out stuff you don’t need to carry all the time

Me with 413 inventory slots, 29 of them shared.