Download CarbonCopyProduct pageAll docs
Windows PC only — CarbonCopy is a desktop app for Windows. Open kvrnl.io on your Windows computer to download it. Your license key stays saved to your account.
Overview
CarbonCopy watches the folders you care about and instantly mirrors any change to up to three backup destinations — an external drive, a network drive, or another folder. A background safety-net sweep catches anything missed while you were offline.
Deleted files are kept in a dated recycle bin so accidents are recoverable, and your source folders are only ever read, never modified. Free to use — claim your license key and download it here.
- Real-time mirroring, ~1-second sync
- Up to three backup destinations
- Recoverable deletes with a Recycle Bin
- Source folders are never modified
Set up your first backup
Open CarbonCopy and add one or more source folders — the folders you want protected. Then add up to two destinations (an external drive, a network drive, or another local folder). CarbonCopy immediately mirrors the sources and keeps them in sync the instant anything changes.
Your source folders are only ever read, never modified — the mirror is strictly one-way.
Recover a deleted file
When a file is removed from a source, CarbonCopy moves the backed-up copy into a dated, per-destination Recycle Bin rather than deleting it outright. To restore, open the destination's recycle folder and copy the file back.
Tips
- Pause a destination anytime from the tray menu (e.g. while a network drive is offline).
- The background safety-net sweep catches changes made while CarbonCopy wasn't running.
- CarbonCopy lives in the system tray — closing the window keeps it backing up.
Back up to a network or external drive
Any folder Windows can see works as a destination — an external USB drive, a mapped network drive, or another local folder. Add it as a destination and CarbonCopy mirrors to it in real time. If a drive goes offline, pause that destination from the tray; the safety-net sweep catches up once it's back.
What CarbonCopy is (and isn't)
CarbonCopy is a one-way mirror — it keeps your destinations identical to your sources, perfect for an always-current backup. It isn't version history: to recover an older copy of a file you've changed many times, you'd want a versioned backup tool. Deleted files, though, are recoverable from the per-destination Recycle Bin.
Install & activate
Download CarbonCopy above (or from your account), run the installer, and launch it. On first run, paste your license key from your account to activate — it binds to this computer. The full account, key, and install walkthrough is in the getting-started guide.
Need a hand?
Check the troubleshooting tips, browse the FAQ, or reach us from the contact page — we read everything.
See also
Head to the CarbonCopy product page to download it, or read the guides for our other free tools: