Items can be put away in a warehouse in addition to the normal possession quota.
Warehouses are common to all accounts and can be shared among play data.
Warehouses are separated by game mode. (For example, Part 1 play data and Part 1 Hardcore play data have separate warehouses.)
When an item is received from another play data, a ▲ icon will be displayed on the item.
If you receive this item, the received play data will not be registered in the rankings.
This is done to deter players from passing items from the preceding play data to speed up the game.