Glossary

Checksum (SHA-256)

A checksum runs a file through a hash function that produces a fixed-length value, like a SHA-256 digest. Change a single byte and the result changes completely, so comparing checksums before and after a transfer proves the file arrived without corruption. In media workflows this matters because a silently damaged frame in a master can ruin a delivery, and large transfers over the internet are not immune to errors.

The same fingerprint also identifies duplicates. If two files share a SHA-256 hash they are the same content, so a system can skip uploading a clip it already holds and avoid storing it twice. This deduplication saves both transfer time and storage, which adds up fast when teams re-import the same rushes across projects.

Examples

•A SHA-256 hash confirms a 40 GB upload arrived without corruption
•Two clips with the same hash are recognised as identical and stored once
•A re-imported card is skipped because its files are already hashed and present

In Sanbila

Sanbila computes a SHA-256 hash of every file before upload, so it can verify integrity on transfer and deduplicate, skipping any clip already stored in your cloud rather than uploading it twice.

Frequently asked questions

How is Sanbila different from the proxy generator built into my NLE?+

Premiere Pro, DaVinci Resolve, Final Cut Pro and Avid all generate proxies locally, but they keep the original full-resolution files on the same SSD — so the disk fills up twice. Sanbila stores the originals in the cloud (Cloudflare R2) and keeps only the lightweight proxies on your machine. At export, Smart Relink streams the originals back via a local WebDAV mount, so you finish at full quality without ever downloading the source files.

Does Sanbila work offline?+

Yes for editing — once a proxy is cached on your SSD, you can cut, trim, color and arrange your timeline without an internet connection. You only need network access for the initial import (uploading originals to the cloud) and for the final export (streaming originals back via WebDAV).

How much cloud storage does the free plan include?+

The free plan includes 5 GB of cloud storage and one project, with no credit card required. Paid plans start at $49 per month for 2 TB and 50 projects, going up to 25 TB on the Enterprise plan with overage billing for teams that need more.

What upload speed do I need to use Sanbila?+

Any broadband connection works for the initial upload — Sanbila chunks files into 50 MB parts and uploads in parallel, so a typical 100 Mbps fiber line uploads 1 hour of 4K H.264 footage in about 6 minutes. After upload, day-to-day editing happens on local proxies, so your connection speed only matters again at export time when originals are streamed.

Which video formats does Sanbila support?+

Sanbila handles 22+ formats out of the box: MP4, MOV, MXF, R3D (RED RAW), BRAW (Blackmagic RAW), ARRI proxies, ProRes, DNxHR, DNxHD, H.264, H.265, plus WAV and AAC for audio. Both 4K and 8K sources are supported up to 200 GB per single file (URL imports have no size limit).

Related terms

Multipart upload

Multipart upload splits a large file into smaller parts that upload independently, often in parallel, then reassembles them into one object in storage.

Object storage

Object storage keeps each file as an object with its own metadata and unique key in a flat namespace, built to scale to billions of items rather than mimic a folder tree.

Cloud storage

Cloud storage holds files on remote servers reached over the internet, providing capacity, redundancy, and access from anywhere without owning physical drives.

Sources

SHA-256 and the SHA-2 family (FIPS 180-4) · NIST
Checking object integrity in Amazon S3 · Amazon Web Services