Glossary
Thumbcache
The per-user Windows thumbnail cache (thumbcache_*.db) introduced in Windows Vista, stored under %LOCALAPPDATA%\Microsoft\Windows\Explorer.
Thumbcache is the thumbnail cache Windows Explorer has used since Windows
Vista. Thumbnails of pictures, videos and documents are stored in a set of
per-user databases named thumbcache_<size>.db under
%LOCALAPPDATA%\Microsoft\Windows\Explorer, one database per size class, with
thumbcache_idx.db as the index. Each entry is identified by a 64-bit
thumbnail cache ID and starts with the signature CMMM. Because thumbnails
remain after the source files are deleted, thumbcache is an important artifact
in digital forensics.