Scanning
Parallel scanning of local and network drives; after the first pass only changed files are read again.
The problem and the solution
The problem
With many drives, local and on the network, I didn't know where the space went, which files were duplicates and whether a backup really held everything.
The solution
It indexes the drives once and then only what changes. It shows the space as a treemap, finds duplicates by content and compares a drive with its backup, listing what is missing.
01 — Overview
What it does
Prism indexes local and network drives, finds duplicate files, shows space usage as a treemap and checks whether a backup drive contains everything.
Search
Full-text search over the index with filters for size, extension, type and path, also from a global shortcut (Ctrl+Space).
Duplicates
Duplicate files found by content hash (BLAKE3) and similar images by perceptual hash, with the space wasted by each group.
Space usage
Folder tree and interactive treemap of the space in use, with the distribution by file type.
Backup check
Checks whether every file on one drive is also on another, and lists what is missing grouped by folder.
Drive monitor
Notices when drives go online or offline and queues the known ones for a new scan when they come back.
02 — Details
Requirements and stack
Platform Windows
Download 7.1 MB
Installation Not needed
License MIT
Requirements
Windows. Prism is portable: download Prism.exe and run it, no installation needed.
The index is kept in a local SQLite database in the user's application data.
Built with
Projects
Orbit 
Pulse 
Argus 
Cove 
Inlay