A 64k Fluid Storage Disk is an item where items from the storage system are stored on. It has to be put in a Disk Drive.
The 64k Fluid Storage Disk won’t despawn when dropped in the world.
Uncrafting
Sneak and right click while holding the empty 64k Fluid Storage Disk to retrieve the various parts back:
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The corresponding fluid storage part
Storage capacity
The 64k Fluid Storage Disk can store 64.000 millibuckets or 64 buckets of any fluid.