Uploading Attachments

You can attach almost any type of file to a sheet, row, discussion, or workspace. You can attach files from your computer or files stored in supported third-party cloud storage services. 

This article discusses attaching files from your computer. For information about attaching files from third-party cloud storage services, see Attachments from Google Drive, OneDrive, Box, Dropbox, Evernote, Egnyte & URL.

TIP: If you commonly receive attachments in email, note that you can capture those in a sheet via the Smartsheet for Gmail add-on or the Smartsheet for Outlook add-in. For more information, see these articles:

Attachments and Sharing Permissions

Anyone who has been shared the sheet or workspace (Viewer, Editor, Admin) can view and download the attachments. Everyone except Viewers will be able to add, edit, or delete attachments.

Play Icon Jump to video demonstration: Attachments & File Sharing

Supported File Formats and Sizes

The vast majority of file types are supported for uploading, including image, PDF, Microsoft Word, Microsoft Excel, and Microsoft PowerPoint files. For security reasons we don’t allow you to upload file types that could pose a risk when downloaded, such as .exe, .cmd, .js, .jsp, and .bat file types.

The maximum size of a file that can be uploaded to a sheet owned by a licensed (paid) user is 250 MB per file. For a sheet owned by a trial account, this maximum is 30 MB per file. You can upload 100 files at a time. While there isn't a limit to the total number of attachments allowed on a row or sheet, you are bound by the amount of storage space included in the sheet owner's subscription.

As the owner of a Basic (or legacy Advanced) plan, or a SysAdmin on a Team plan, you can review the storage space allowed on your plan and the amount you're currently using by clicking Account > Account Admin.

NOTE: A browser that supports HTML 5 is required to upload files larger than 30 MB. For more information about supported browser types and versions, please see System Requirements for Using Smartsheet.

Uploading an Attachment from Your Computer

The steps you use to attach a file will depend on the type of Smartsheet item you're working with. Follow the steps for the item type you're using to open the Attachment Summary form.

NOTE: You won't be able to attach files at all if you're using an Enterprise account and your SysAdmin has disabled File Attachment Options.


Open the sheet and click the Attachments tab at the bottom of the Smartsheet window.


Click the drop-down arrow to the right of the row number and select Row Attachments.
NOTE: Rows containing attachments will display the attachment icon in the Attachments column.

New Discussion or Discussion Comment

Click the Discussions tab at the bottom of the sheet and choose one of the following:

  • Click New Discussion to begin a new discussion. Enter in the discussion title and comments and click the Attach File link underneath to add an attachment to it.

  • Click on an existing discussion, enter your comments into the Add a Comment text field, and use the Attach File link underneath to include an attachment.

NOTE: Attachments can’t be added to existing discussion comments.


  1. Click the Home tab at the top of the Smartsheet window and then click the name of the workspace in the left sidebar.  The list of items contained in the workspace will appear in the middle of the screen. 
  2. Click  the Attachments button in the upper-right section of the Smartsheet window (near the Sharing button).

In the Attachments Summary form that appears, do the following:

  1. Click Attach and then click Upload from computer.
  2. The directory structure form from your computer will appear. Locate the file you want to upload and then click Open.
  3. You can upload multiple attachments at once by holding down the [Shift] or [Ctrl] key, and then clicking on the file names.
    TIP: You can also drag-and-drop files from your computer's file directory into the Attachments window to upload them to Smartsheet.

Once you've added an attachment, you and collaborators with the appropriate permissions can view, upload a new version or delete it.

Video Demo

For an instructional demonstration on using attachments, please review the video walk-through below:

If you don't have access to YouTube, click here to watch the video. Back to Top

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