Snapshot: your computer, rewindable
Freeze a point-in-time, encrypted copy of your working space. Roll back a mistake, or unpack a brand-new computer into your old one.
What it does
A snapshot walks your working space, splits it into content-defined chunks, encrypts every chunk on your machine with keys only your devices hold, and uploads the result to your bucket. Identical data is stored once — take a snapshot every week and you pay for what changed, not ten copies of everything.
Restore works anywhere you sign in: same machine (roll back), or a brand-new one. The migration-day promise: install CelDrive, pick a snapshot, unpack — the new computer becomes your old one.
walk → chunk → encrypt → upload
✓ snapshot created
$ celdrive snapshot list
ID CREATED SIZE NAME
01JZ…9FK4 2026-07-05T21:12Z 18.4 GB before-os-upgrade
Zero-knowledge by design
Chunks are encrypted with AES-256-GCM before they leave your machine. The data key is wrapped by a key derived on your device; what our servers see is ciphertext and a small unencrypted summary (name, date, size) so the dashboard can list your snapshots. We could not read your snapshot contents if we wanted to — and we designed it that way on purpose.
How it's different from Mirror
Mirror answers "protect my files continuously" — a rolling copy, 15 minutes behind, with 30 days of per-file history. Snapshot answers "freeze this exact moment" — a named, immutable point you can return to weeks later, or carry to a different machine entirely. Mirror is insurance; Snapshot is a time machine and a moving truck.
Honest framing: where it is today
- Early access, CLI-first. The engine (chunker, encryption, manifest, restore) is complete and its restore path is tested to be byte-identical. The command ships for Apple Silicon Macs today; the dashboard button and other platforms follow.
- Profile snapshots first. Today's default captures your user space — documents, projects, preferences, dotfiles — not a bootable disk image. Whole-disk mode exists behind a flag and matures next.
- App reinstalls aren't magic. Restore brings back your files, preferences, and a list of your apps. Reinstalling the apps themselves happens via that list — not by copying system internals Apple doesn't allow us to copy.