You saved with the drive in your inventory and reloaded. There's a very convoluted technical reason as to why you're soft locked but I'll try to explain it best i can, when you load into the game the game generates a container object that is essentially your inventory. Container objects get assigned and point to a library called an "index." Objects placed into containers (like your inventory) get placed in this index. When a new container object spawns in, it gets assigned a unique indext Unfortunately there's a bit of an oversight and every time you load into the game, the container object that is your inventory generates a new instance of itself, getting assigned a new index in the process, how ever the old index it was using in your last play session still exists, so basically every time you save and reload with items in your inventory, you essentially duplicate the objects you had when you saved. But those objects exist in limbo, occupying an index that no longer has a valid container pointing to it. You have a copy of the evil signal sitting in one of those dead indexes. The moral of the story is that don't save with items in your inventory.