Back up with Duplicati to dosya

Why dosya works well with Duplicati

• Checks and restores cost nothing

  After each run Duplicati downloads a sample of its volumes to check them, and compacting downloads old volumes to repack them. On paid plans, downloads are free, so a full restore costs the same as a quiet month.

• No per-request fees

  Duplicati lists the destination and uploads many small files on every run. dosya charges one flat price for the space, never per request.

• Encrypted twice

  Duplicati encrypts every volume with AES-256 and a passphrase only you hold before it leaves your computer. dosya encrypts it again at rest.

• Stored where you choose

  Pick the region when you create the workspace. Your backup stays there.

Set up Duplicati with dosya over S3

About ten minutes in Duplicati's web interface. Field names below are exactly what Duplicati shows.

1. 1

   Create S3 credentials in dosya

   In the dosya web app, open Profile > API keys and create a key for this computer. Limit it to S3 and to the workspace you will back up to, then turn on S3 credentials. Copy the access key ID and the secret key now; the secret is shown once. Your workspace ID, which is the bucket name, is on Integrations > S3.

   One key per computer means you can revoke it if the computer is lost, without breaking anything else.

2. 2

   Add a backup in Duplicati

   Open Duplicati, click Add backup and choose New backup. Give it a name, keep Encryption on AES-256 and set a strong passphrase. Store the passphrase outside this computer, in a password manager: without it nobody can restore the backup, including us.

3. 3

   Choose S3 Compatible and enter the dosya details

   On the destination step, under Select storage type, pick S3 Compatible and fill it in like this:

   Server

   s3.dosya.dev Type it into the field; it is not in Duplicati's list of providers yet.

   Use TLS (https)

   On Duplicati's S3 default is unencrypted http; dosya only accepts https.

   Bucket name

   Your workspace ID From Integrations > S3. dosya buckets are workspaces, so never let Duplicati create a new one.

   Folder path

   duplicati/laptop Any folder name. Use a different folder for each backup job.

   Access Key ID

   Access key ID from step 1 Starts with DOSYA

   Secret Access Key

   Secret key from step 1

   Leave the advanced options alone. The default AWS Library works with dosya as it is; the MinIO Library refuses workspace IDs because they contain capital letters.

4. 4

   Test the connection

   Click Test now. You should see Success! Test completed, destination is empty. If Duplicati offers to create the bucket instead, the bucket name is wrong: copy the workspace ID again.

5. 5

   Pick the folders and a schedule

   Choose what to back up on the source step, then set the schedule. Daily is typical; Duplicati only uploads what changed since the last run.

6. 6

   Keep the volume size at 50 MB and choose retention

   On the options step, leave Remote volume size at the default 50 MB. For Backup retention, Smart backup retention is a good start: it keeps one version per day for a week, one per week for a month and one per month for a year.

   dosya accepts uploads of up to 100 MB per request, so keep remote volumes at 64 MB or less.

7. 7

   Run it, then test a restore

   Save and run the backup. When it finishes, restore one folder to a new location (next section) and open a few files. Now you know the backup works before you need it.

WebDAV or SFTP instead

Same steps, a different storage type on the destination step. Encryption, schedule and retention are set up the same way.

Restore your files

1. 1

   Restore files from this computer

   In Duplicati, open Restore, choose the backup, pick a version and tick the files or folders you need. Restore to a new folder the first time, so nothing on the computer is overwritten.

2. 2

   Lost the computer? Restore anywhere

   Install Duplicati on any computer, open Restore and choose Direct restore from backup files. Enter the same dosya destination as before (a new S3 key works fine) and your passphrase. Duplicati reads everything it needs from dosya; the old computer's database is not needed.

   We tested exactly this: a restore with no local database, from dosya alone, matched the source byte for byte.

Tested end to end

Duplicati 2.4.1.0 (stable) against our live servers on November 6, 2026, with 1,408 files, 268 MB: text, photos, five 30 MB videos and Unicode folder names.

Storage for your Duplicati backups

One flat price for the space. No per-request fees, and on paid plans no charge to download.

• 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

Prices in USD. Smaller plans from $1.49 a month for 100 GB. See every plan.

Questions

Using restic, Kopia, rclone or a NAS backup app? See NAS cloud backup and connecting over S3.