Bū tools
Backups
Are your files really safe? The 3-2-1 rule.
What it does
Describe where your files are (a project, your rushes, your photo library): the tool tells you whether you follow the 3-2-1-1-0 rule, and what is missing.
- 3 copies, the original included. 2 kinds of media. 1 copy elsewhere (another place; the cloud counts). 1 copy offline (unplugged, or a tape). 0 errors: every copy checked.
- RAID is not a backup: it survives a dead drive, not a deleted file, a virus, a fire or a theft. A sync (a folder mirrored to the cloud) copies your mistakes too.
- Checksums (xxHash, MD5, SHA): a fingerprint of each file, compared between the original and the copy. Offload tools on set (Silverstack, ShotPut Pro, Hedge…) do it for you.
How long media last (rough guides, not promises)
- Hard drives: often 3 to 5 years of use; replace them before they fail.
- SSD and memory cards: fast, but not for archiving; left unplugged for years, they can lose data.
- LTO tape: made to last decades, stored well; you need a drive to read it.
- Cloud: as long as the service and your subscription.
Free, no account, nothing is sent: it runs in your browser, even offline.
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- Verify a copy · Compare a folder and its copy, byte by byte, and find duplicates
- RAID calculator · Usable space and protection of your disks
- Cables · HDMI, SDI, USB, Thunderbolt, XLR… speeds and plugs
- Composition · Rule of thirds, golden spiral and other grids, on your photo
All tools · Français
