topic Re: Workato SFTP connector: how to disable multipart uploads? in Workato Pros Discussion Board

Workato SFTP connector: how to disable multipart uploads?

eranarigiil — Tue, 04 Nov 2025 12:32:38 GMT

We are using the SFTP connector via OPA.

We are trying to upload a 25MB file to an SFTP site. The site does not support the multi part option: uploading smaller temp files and then renaming them. The error we get: permission denied. Uploading smaller files works correctly.

If we use WinCSP the following works when we set:

disable transfer/resume to temporary filename

We tried to add to the SFTP connector in Workato:

useTempFile=false

resumeSupport=false

This didn't work.

How can we achieve it in Workato? (increasing the file chunk more than 20MB or disabling the automatic multipart upload)

Thanks

Eran

Re: Workato SFTP connector: how to disable multipart uploads?

Sathwik_Malli — Tue, 04 Nov 2025 14:50:25 GMT

Hi @eranarigiil ,

In the first approach, the file can be divided into smaller chunks within the recipe (for example, 5 MB each) and uploaded sequentially to the target SFTP location. Once all parts are uploaded, a rejoin or merge script can be executed on the target system to reconstruct the original file. After successful reassembly, the temporary chunk files can be deleted to free up space.
In the second approach, the complete file can first be uploaded to Workato file storage, then compressed to reduce its size before being transferred to the SFTP destination. After confirming a successful upload, the compressed file should be deleted from Workato file storage to maintain efficiency. Both approaches can be executed entirely at runtime within the same recipe, ensuring end-to-end automation.

Re: Workato SFTP connector: how to disable multipart uploads?

Sathwik_Malli — Tue, 04 Nov 2025 14:59:44 GMT

for the 3rd Approach, May be you can use this "File Tools by Workato" and "Compress Files" action and see if this works.

Re: Workato SFTP connector: how to disable multipart uploads?

eranarigiil — Mon, 10 Nov 2025 12:42:48 GMT

Thanks for your reply. We expect Workato SFTP connector via OPA to behave as a regular sftp client. With 3rd party tools there aren't any issues to upload a 30MB csv file as a whole.

The SFTP site belongs to a 3rd party provider and we can't control its permissions or run any scripts

Yours

Eran

Re: Workato SFTP connector: how to disable multipart uploads?

Sathwik_Malli — Mon, 10 Nov 2025 12:56:02 GMT

Hi @eranarigiil ,
Please increase the transfer buffer size in the SFTP Connection settings, as shown in picture below.
Doc Link : Workato connectors - SFTP search files/folders action | Workato Docs
.

Re: Workato SFTP connector: how to disable multipart uploads?

Sathwik_Malli — Tue, 11 Nov 2025 06:59:35 GMT

Try increasing the Transfer Buffer size in the SFTP connection settings