I’m using the web version of Duplicacy and it is on version 1.8.3.
I have created a job schedule to copy from source to google drive and it failed. It says “ERROR CHUNK_DECRYPT An RSA private key is required to decrypt the chunk
An RSA private key is required to decrypt the chunk”.
So what I did was:
- Generate RSA public and private key on PKCS#1 format.
- I created a local disk storage(for example, Z_Media), add password, tick RSA encryption then add the public.pem key that was generated on step 1.
- On backup, I created a backup, choose the local directory to be backed up(Media folder), and choose the storage that was created on step 2.
- Then I click the “play” button to start the backup. Then I run the “Check” job so I can see the stats of it.
- I want to copy the already backup folder(Z_Media) to Google Drive.
- So I created another storage GD_Media, same password and same RSA public key. This time, I also tick the “Copy compatible” and choose “Z_Media”.
- Then I run copy job on the schedule tab but the error is:
“Running copy command from /cache/localhost/all
Options: [-log copy -from Z_Media -to GD_Media]
2026-06-19 16:35:07.383 INFO STORAGE_SET Source storage set to /data_backup/Media
2026-06-19 16:35:07.402 INFO STORAGE_SET Destination storage set to gcd://Duplicacy/Media
2026-06-19 16:35:18.894 INFO BACKUP_KEY RSA encryption is enabled for the destination
2026-06-19 16:35:19.851 INFO SNAPSHOT_COPY Chunks to copy: 2238, to skip: 0, total: 2238
2026-06-19 16:35:19.907 ERROR CHUNK_DECRYPT An RSA private key is required to decrypt the chunk
An RSA private key is required to decrypt the chunk”
How to solve this? I have the private key but where should I put it?
For clarification:
Media folder - local directory to be backup
Z_Media - local directory that contains the backup of Media folder.
GD_Media - Google Drive storage that should contains the same contents on the Z_Media because of the “Copy” job.