Holobuffer

A holodeck pattern buffer or "holobuffer" is a data storage system in which holographic programs are stored when they are not in use. Part of a ship's holodeck systems, it acts in a similar function to the transporter's pattern buffer.

In 2372, The Doctor transferred the mind of Denara Pel into the holobuffer and created a holographic body for her when she was dying from the Vidiian Phage. 

In 2375, Seven of Nine assisted The Doctor in reconstructing deleted memories using residual photons in the holobuffer. 

In 2377, USS Voyager received a large transmission from Starfleet. Since the subspace transceiver was not designed to store holographic patterns, Harry Kim transferred the hologram to the holodeck's pattern buffer.