The Most Powerful n8n Automation for Beginners

About this video

Garrick, in partnership with Hostinger, builds a beginner n8n automation that collects files by email instead of a shared folder: people attach a file to an email with a keyword in the subject line, and n8n automatically saves the attachment to Google Drive, running 24/7. The workflow uses a Gmail trigger set to ‘on message received,’ polling every minute, with a search filter of ‘subject:RECEIPT2026 has:attachment’ — optionally adding ‘is:unread’ as a safeguard — so only matching emails fire it. Gmail access is via an OAuth2 credential using a client ID and client secret rather than a Google password, created once and reusable across workflows. A second Gmail node, ‘get a message,’ uses an expression for the triggering message ID, turns off simplify, and enables download attachments. A Google Drive ‘upload file’ node then takes the binary field shown as attachment_0 and saves it to a previously created ‘2026 receipts’ folder. After testing each step and running the full workflow, Garrick clicks publish (called activate in some versions) so it checks Gmail continuously. He notes the build used a Hostinger-hosted n8n instance but works on any instance, suggests the entry-level KVM1 and KVM2 plans for basic automations, and mentions the coupon code STARTN8N for an additional 10% off. Suggested expansions include renaming files with sender name and date, sorting into monthly folders, sending a confirmation reply, and adding an AI step to summarize or categorize the email.

Key takeaways

• Build around behavior people already know — attaching a file to an email — instead of teaching them to upload to a shared folder
• The Gmail trigger polls every minute and is narrowed with Gmail search syntax: ‘subject:RECEIPT2026 has:attachment’ in the walkthrough
• Connect Gmail with OAuth2 client ID and client secret, not your Google password; the credential is set up once and reused in any workflow
• A ‘get a message’ node with download attachments enabled is needed to fetch the file, which the Drive node uploads from the binary field attachment_0
• The workflow only runs automatically after you publish/activate it; Garrick suggests extensions like auto-renaming, monthly sorting, confirmation replies, and AI categorization

Episode details: published February 26, 2026 · 13:46 long. Summary written by Self Growth Videos from the episode itself. Business results and any income figures mentioned are Kevin Stratvert’s own claims, shared for education — they are not typical or guaranteed.

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