SymSnap
From CPCWiki - THE Amstrad CPC encyclopedia!
SymSnap is a snapshot loader for SymbOS and was written by Prodatron. It runs on a real CPC, where it can load and execute snapshot files (*.SNA), which have been generated inside a CPC emulator. It is the first disc and hard disc based program of its kind.
It reads the SNA versions 1, 2 and 3 with memory dumps of 64KB or 128KB. The extended CPC Plus and CRTC sync information included in the version 3 are currently not supported, you also can't load SNAs with memory dump compression.