Beginner
How to attach files to cards on Trello
Quick Answer
Attach files to Trello cards by opening the card, clicking the Attachment button in the sidebar, then choosing to upload from your computer, Google Drive, Dropbox, or other connected services. Files can be up to 10MB on free accounts and 250MB on paid accounts.
Prerequisites
- A Trello account
- Access to a Trello board
- Files ready to upload on your device
- Basic familiarity with Trello cards
1
Open the Trello card
Navigate to your Trello board and click on the card where you want to attach a file. The card will open in a detailed view with options on the right sidebar.
Tip
You can also hover over a card and press
Enter to quickly open it.2
Click the Attachment button
In the card's right sidebar under the Add to card section, click the Attachment button. This will open the attachment options menu.
3
Choose your file source
Select how you want to attach your file:
- Computer - Upload from your local device
- Google Drive - Attach from Google Drive
- Dropbox - Attach from Dropbox
- OneDrive - Attach from Microsoft OneDrive
- Link - Attach a file via URL
Tip
Connect your cloud storage accounts in Trello settings for easier access to files.
4
Select and upload your file
If uploading from Computer, click Choose a file and browse to select your file. For cloud services, navigate through your folders and select the file you want to attach. Click Attach to confirm.
Tip
You can drag and drop files directly onto the card for faster uploading.
5
Add a file description (optional)
After selecting your file, you can add a description in the text field that appears. This helps team members understand what the file contains. Click Upload or Attach to finalize.
Tip
Use descriptive names to make files easier to find later.
6
Verify the attachment
Once uploaded, the file will appear in the Attachments section of the card. You'll see the file name, size, and upload date. A small paperclip icon will also appear on the card thumbnail in board view.
Tip
Click on the attachment to preview or download it.
7
Manage your attachments
To remove an attachment, hover over it in the card and click the Delete (trash can) icon. You can also click Edit to change the file description or make it a card cover image.
Tip
Use the Make Cover option for image files to create visual card covers.
Troubleshooting
File size too large error
Free Trello accounts have a 10MB file limit, while paid accounts allow up to 250MB. Compress your file or upgrade your account to attach larger files.
Cannot connect to cloud storage
Go to your Trello account settings and authorize the connection to Google Drive, Dropbox, or OneDrive. Make sure you're logged into the correct cloud storage account.
Attachment button is missing
Ensure you have edit permissions on the board. Board admins may have restricted attachment permissions. Contact your board administrator if the issue persists.
File won't preview in Trello
Trello supports previews for common file types like images, PDFs, and documents. Unsupported file types will show as download links instead of previews.
Ready to get started with Trello?
Put this tutorial into practice. Visit Trello and follow the steps above.
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