When blobs reach their end epoch on the Walrus network, they lose the guarantee of being unreadable and become unavailable, marking the end of their lifecycle on the network. If you have marked a blob as deletable, you can delete it before it expires to free up storage space for other purposes. This does not refund the WAL used to register and store the blob but reclaims the storage resource that was allocated to it. The reclaimed storage can be used for new blobs.

Once a blob expires, you can reclaim the Sui object representation of the blob, which allows you to reuse the storage for subsequent operations. However, the WAL used for the blob cannot be recovered. You can find more detailed operations about blob deletion and storage management in the documentation here: Dev Guide on Delete Operations.