How Real-Time Sync Works

Monitor Folder Changes

The SquirrelBak Sender runs quietly on your production PC, watching your selected folders using Windows filesystem events.

As soon as a file is created or modified (e.g., a new document saved), it’s detected instantly—no polling, no delay.

Queue for Transfer

Detected files enter a persistent transfer queue to handle bursts of activity smoothly and ensure nothing is missed.

The queue survives reboots, crashes, and network outages—sync resumes exactly where it left off.

Filter: Whitelist & Blacklist

Files are checked against your rules before transfer:

• 🚫 Blacklisted types (e.g., .tmp, .log, .cache) → Skipped
• ✅ Whitelisted types (e.g., .docx, .xlsx, .jpg) → Sent immediately
• ❓ Unknown types → Held in Pending Review (optional alert)

This keeps your backup clean and focused on what matters.

Copy to Backup PC

Approved files are securely copied to the SquirrelBak Receiver on your idle PC—located elsewhere (e.g., office, home, closet).

One-way only. No sync conflicts. No restore logic. Just pure, silent, continuous backup—perfect for growing data like documents, reports, and media.