How to create a daily backup workflow in n8n for a nested OneDrive folder to Google Drive with retention

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I’m trying to create a workflow in n8n to automatically backup a folder from OneDrive to Google Drive every day, including all subfolders and files. I also want to keep only the last 30 daily backups in Google Drive.

OneDrive folder structure:
Folder1
├─ Folder2
└─ Folder3

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I want to backup Folder1 completely, including Folder2 and Folder3, into a daily folder in Google Drive like /Backups/Daily/YYYY-MM-DD/.
I don’t have a domain, only my server IP.
I’m self-hosting n8n on Docker.

What I’ve done so far

• Created Schedule Trigger node for daily execution.
• Added Microsoft OneDrive → Get items in a folder node for Folder1.
• Unsure how to download all files recursively from subfolders.
• Plan to use Google Drive → Upload a file node to create daily backup folders.
• Need to implement automatic retention (delete backups older than 30 days).

My questions

1. How can I recursively process all subfolders in OneDrive using n8n nodes?
2. What is the recommended way to maintain folder structure when uploading to Google Drive?
3. How should I implement automatic deletion of old daily backups in Google Drive?

I’d appreciate step-by-step guidance or example workflow JSON if possible.

No error yet — just unsure how to handle recursive folders and retention.

I haven’t created a complete workflow yet; I only have:

• Schedule Trigger (daily)
• Microsoft OneDrive → Get items in a folder (Folder1)

I’m trying to create a workflow in n8n to automatically backup a folder from OneDrive to Google Drive every day, including all subfolders and files. I also want to keep only the last 30 daily backups in Google Drive.

Here’s my scenario:
OneDrive folder structure:

Folder1
 ├─ Folder2
 └─ Folder3

I want to backup Folder1 completely, including Folder2 and Folder3, into a daily folder in Google Drive like /Backups/Daily/YYYY-MM-DD/.
I don’t have a domain, only my server IP.
I’m self-hosting n8n on Docker.

What I’ve done so far:

• Created Schedule Trigger node for daily execution.

• Added Microsoft OneDrive → Get items in a folder node for Folder1.

• Unsure how to download all files recursively from subfolders.

• Plan to use Google Drive → Upload a file node to create daily backup folders.

• Need to implement automatic retention (delete backups older than 30 days).

My questions:

1. How can I recursively process all subfolders in OneDrive using n8n nodes?

2. What is the recommended way to maintain folder structure when uploading to Google Drive?

3. How should I implement automatic deletion of old daily backups in Google Drive?

I’d appreciate step-by-step guidance or an example workflow JSON if possible.

Information on your n8n setup

• n8n version: latest (1.115.x)
• Database: SQLite (default)
• n8n EXECUTIONS_PROCESS setting: default (own)
• Running n8n via: Docker
• Operating system: Ubuntu 22.04 LTS