Keeping a file's extension when creating it from "Get File Content"

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Posted on by SP-26101405-0

Hi,

My flow starts with a Form through which users can provide attachments.

These attachments are automatically saved to a OneDrive folder, and my flow copy these on different Sharepoint folders through "Get File Content" [OneDrive] and "Create File" [SharePoint]. I use this opportunity to rename the file according to a specific nomenclature.

Does anyone know how to preserve the Extension of the original file?

Please keep in mind my level is that of a beginner.

Thanks!

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Building flows

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CU08111613-0 14 on at

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Use this flow layout to preserve the file extension when renaming:

Trigger: When a new response is submitted (Forms).

Action: Get attachments.

Action: Get file content (OneDrive).

Compose: Extract the original file name.

Compose: Extract file extension using split() and last()
last(split(outputs('Compose_FileName'), '.'))

Compose: Create the new filename by appending the extension
concat('YourNewFileName_', utcNow(), '.', outputs('Compose_FileExtension'))

Action: Create the file (SharePoint) with the new filename.

This layout will keep the original file extension while applying a new name.

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CFernandes 8,402 Most Valuable Professional on at

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Hey Mate, Just use the expression below

In Compose, this will give you the file extension - split(item()['name'],'.')[1]

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creativeopinion 10,502 Super User 2025 Season 2 on at

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You might be interested in this YT Tutorial: How to Add Microsoft Form File Uploads to a SharePoint List Item

Although this specific tutorial covers how to add a MS Form file upload to a SP list item, the concepts covered in this tutorial can be applied to your flow. If you get suck—upload screenshots of your flow in the Classic Designer (toggle off the New Designer) with all actions expanded (in Edit Mode).

In this Microsoft Power Automate Tutorial I’m going to cover how to add file uploads to a SharePoint list item. First, I’ll show you how to get the file name and content from the File Uploads from your Microsoft Form, then I’ll show you how to add those files to a SharePoint item.

IN THIS VIDEO:
✓ Two types of MS Forms
✓ Where Microsoft Personal (OneDrive) Form File Uploads are Saved
✓ Where Microsoft Group Form File Uploads are Saved
✓ How to Add a File Upload Question to an MS Form
✓ How to get a Microsoft Form ID
✓ How to get a Microsoft Form Response
✓ How to Get the Dynamic Content Microsoft Form File Upload Content
✓ How to handle Single and Multiple Microsoft Form File Uploads
✓ How to use a Scope action to Organize and Group Your Flow Actions
✓ How to Get the File Content from an MS Form File Upload
✓ How to Collect All Files from Multiple File Upload Questions
✓ How to Handle MS Form Response When a File Isn’t Uploaded
✓ How to Attach an MS Form Single File Upload to a SharePoint List Item
✓ How to Attach Multiple MS Form File Uploads to a SharePoint List Item
✓ How to Attach MS Form File Uploads to an Email

Hope this helps!

Consider giving me a ❤️ if you liked my response!

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