M (exquisite chest constructed from rare materials worth 1,000 sp, consumed)
As two actions, you hide a chest, and all its contents, on the Ethereal Plane. You must touch the chest and a miniature replica. The chest can contain up to 1 cubic meter of nonliving material.
While the chest remains on the Ethereal Plane, you can use an action and touch the replica to recall the chest. It appears in an unoccupied space on the ground within 1 meter of you. You can send the chest back to the Ethereal Plane by using an action and touching both the chest and the replica.
After 60 days, there is a cumulative 5% chance per day that the spell’s effect ends. This effect ends if you cast this spell again, if the smaller replica chest is destroyed, or if you choose to end the spell as an action. If the spell ends and the larger chest is on the Ethereal Plane, it is irretrievably lost.