Skip to content
NAS cloud backup

Affordable NAS cloud backup

Keep an offsite copy of your NAS on dosya. Your NAS's own backup app does the scheduling and versioning; dosya stores the backup over S3, WebDAV or SFTP, from $3.25 per terabyte a month.

Choose a storage plan Find your NAS setup guide

S3 · WebDAV · SFTP · free restores on paid plans

Storage pricing for your NAS backups

One flat price for the space. No per-request fees, and on paid plans no charge to download, so a full restore costs the same as a quiet month.

  • 1 TB $4.49/mo $4.49 per TB a month or $44.99 a year, 16% off
  • 2 TB $6.99/mo $3.50 per TB a month or $64.99 a year, 22% off
  • 4 TB $12.99/mo $3.25 per TB a month or $129.99 a year, 16% off
  • 6 TB $19.49/mo $3.25 per TB a month or $194.99 a year, 16% off
  • 10 TB $32.49/mo $3.25 per TB a month or $324.99 a year, 16% off
  • 20 TB $64.99/mo $3.25 per TB a month or $649.99 a year, 16% off
Restores and downloads
Free on every paid plan
Requests
No per-request or API charges
Smaller backups
Starter $1.49 (100 GB) and Plus $2.49 (500 GB)

Prices in USD. See every plan, including euro prices and 8 TB.

Choose your NAS

Step-by-step guides for each vendor's own backup app: the exact settings, how to restore, and how to bring a backup back onto a replacement NAS.

  • Synology

    Tested

    Hyper Backup

    S3 storage, custom server URL

    Key setting: Path Style, part size 64 MB

    Open the guide

  • QNAP

    Tested

    Hybrid Backup Sync 3

    S3 Compatible storage space

    Key setting: Signature v4, QuDedup on

    Open the guide

  • ASUSTOR

    Tested

    Cloud Backup Center

    S3 optional server, or SFTP

    Key setting: Signature Version 4, SSL/TLS on

    Open the guide

  • Another NAS or app

    TrueNAS, Unraid, restic, Kopia, rclone or anything else that writes to S3, WebDAV or SFTP.

    Duplicati setup guide
    Connect over S3 Connect over WebDAV Connect over SFTP

How NAS cloud backup works

Set it up once in your NAS backup app. After that it runs on its own.

  1. 1

    Make a key just for the NAS

    In Profile → API keys, create a key limited to S3 (or WebDAV or SFTP) and pinned to one workspace. If the NAS is ever lost, revoke that one key and nothing else stops working.

  2. 2

    Add dosya as the backup destination

    In your NAS backup app, choose S3-compatible storage (or WebDAV or SFTP) and enter the connection details on the right: server s3.dosya.dev, path-style requests. The bucket is the workspace ID, shown on Integrations → S3.

  3. 3

    Schedule it, then test a restore

    Your NAS app runs the backup on its schedule and only sends what changed. Restore one folder after the first run, so you know the copy works before you need it.

Connection settings

For Hyper Backup, Hybrid Backup Sync 3 and most backup apps.

Server address
s3.dosya.dev Apps that want a full URL: https://api.dosya.dev/s3
Port
443 (HTTPS)
Region
us-east-1
Request style
Path-style
Signature
Version 4
Bucket
Your workspace ID Integrations → S3 in the web app
Access key ID
Starts with DOSYA Profile → API keys → S3 credentials
Secret key
Shown once Copy it when you turn on S3 credentials
Dashed fields are yours to fill in. Keep HTTPS on and leave immutable or Object Lock options off.

Backup and restore, tested

What we ran against dosya, on which versions, and when. The three NAS apps ran on their own vendor's hardware. Each software row is a first backup of 1,408 files, 268 MB, an incremental run after 80 changes, and a restore that matched the source byte for byte.

SoftwareVersionProtocolWhat passedTested
Hyper Backup Synology S3 Backup and restore on Synology hardware Nov 5, 2026
Hybrid Backup Sync 3 QNAP S3 Backup and restore on QNAP hardware Nov 5, 2026
Cloud Backup Center ASUSTOR S3 Backup and restore on ASUSTOR hardware Nov 5, 2026
restic 0.16.4 S3 Full, incremental, check --read-data, restore identical Nov 5, 2026
Kopia 0.23.1 S3 Full, incremental, 100% file verify, restore identical Nov 5, 2026
rclone 1.75.2 S3 Sync, incremental sync, check, restore identical Nov 5, 2026
rclone 1.75.2 WebDAV Sync, incremental sync, check, restore identical Nov 5, 2026
Duplicati 2.4.1.0 S3, WebDAV, SFTP Full, incremental, verify all, compact, restore identical, restore with no local database Nov 6, 2026

NAS runs went from the NAS itself and software runs from a Linux server, all to our live endpoints, the same ones your NAS connects to.

Security and backup retention

Two pieces of software share the job. Here is who does what.

dosya takes care of

  • Encrypted at rest with AES-256, and TLS 1.2 or higher in transit
  • Stored in the region you pick when you create the workspace
  • Keys limited to one protocol, workspace or folder, revocable at any time
  • Up to 10 earlier versions of an overwritten file, by default
  • Deleted files stay in Trash for 30 days on paid plans

Your NAS backup app takes care of

  • Backup schedule and which folders are included
  • Version rotation: how many backup points are kept
  • Deduplication and compression before upload
  • Client-side encryption with a password only you hold
  • Integrity checks and the restore wizard

dosya does not offer S3 Object Lock or write-once storage, so leave immutable backup switched off in your NAS app.

Questions

Which NAS models and apps work with dosya?

Any backup app that can write to S3-compatible storage, WebDAV or SFTP can point at dosya. We have setup guides for Synology Hyper Backup, QNAP Hybrid Backup Sync 3 and ASUSTOR Cloud Backup Center, and we have run all three against dosya on the vendor's own hardware. The tested table above lists every app we have run end to end.

My NAS died. How do I get my data back?

Install your backup app on the new NAS (or a computer, for apps that offer a desktop restore tool), add the same dosya destination with a key, and choose restore. Downloads are free on paid plans, so pulling back a whole backup costs nothing extra.

How much space will my backup use?

Roughly the size of the data you back up, less what your NAS app saves with compression and deduplication, plus each backup point it keeps. When the app deletes old backup data, those files sit in dosya's Trash for 30 days and count toward your storage until it is emptied. Leave some room for that, or empty Trash from the web app.

Can I use restic, Kopia, rclone or Duplicati instead?

Yes. Point them at s3.dosya.dev as S3-compatible storage with path-style requests, and use your workspace ID as the bucket. Tools that ask for a full endpoint URL can also use https://api.dosya.dev/s3. For rclone, set sign_accept_encoding = false. For Duplicati, follow our Duplicati guide at dosya.dev/integration/duplicati.

Can I back up several terabytes?

Yes. Plans go up to 20 TB, with sizes in between, and you can move up at any time without re-uploading. The first backup takes as long as your upload speed allows; later runs only send changes.

Should I turn on encryption in my NAS app?

We recommend it. Your files are already encrypted at rest on dosya's servers, but encryption in Hyper Backup or HBS 3 means the backup is unreadable without a password only you hold. Keep that password somewhere other than the NAS: without it, the backup cannot be restored by anyone, including us.

Does dosya support immutable backups or Object Lock?

Not yet. dosya keeps file versions and a Trash period, but it does not offer S3 Object Lock, so leave the immutable-backup option off in your NAS app. If you need legal-hold or write-once storage, dosya is not the right destination for that copy.

Can I try it before paying?

Yes. The Free plan includes 5 GB and S3, WebDAV and SFTP access, which is enough to connect your NAS, back up a test folder and restore it. Move to a paid plan when you are ready for the full backup.

Give your NAS an offsite copy

Start on Free with 5 GB to connect your NAS and test a restore. Pick a size when you are ready for the full backup.

Start free Choose a storage plan