Clay, once [[digging|dug]] up, has a high [[decay]] speed and is pointless to store for more than a few days. It can however be kept in a [[Bulk storage bin]].
[[Clay tile]]s can only be raised by dropping [[dirt]] or [[sand]]. They cannot can be lowered by with the [[digginglevel]], command if all corners are higher or level to an adjacent flat tile and your [[Flatteningdigging]], and skill is at least 70. Clay tiles cannot be changed to another type of tile.
To transport a large quantity of clay, you will probably have to combine it. Even a [[small cart]] will likely hold more than 100 2kg lumps of clay. If you do so, be aware of the following: