FORM FILE UPLOAD TROUBLESHOOTING CHECKLIST
Thunder Forms | Updated 4 November 2026

Use the guide for your platform:
https://www.thunderforms.in/blog/google-forms-file-upload-disabled
https://www.thunderforms.in/blog/microsoft-forms-file-upload-greyed-out

GOOGLE FORMS
[ ] If the question type is disabled in the editor, find the form file in
    Drive. Check for a shared-drive location, which differs from a shared
    folder in My Drive.
[ ] If a move to My Drive is needed, ask the shared drive manager about
    an approved move and check editor/respondent access afterward.
[ ] If the form is already in My Drive, ask the Workspace administrator
    whether Data Loss Prevention restricts the upload question.
[ ] If a respondent's upload fails, check their signed-in Google account
    and responder access, then the file's type, size and count. Test a
    small allowed file from their device instead of a shared drive.
[ ] If that fails too, ask the owner to check the form's total upload
    allowance and remaining Drive storage. Capture the exact error.
[ ] Native uploads require a respondent Google account. If the audience
    cannot use one, choose an approved alternative collection method.

MICROSOFT FORMS
[ ] If Upload file is unavailable when adding a question, check the
    audience. Native uploads require respondents within the organization.
[ ] If only the author's upload button is inactive, test Preview or the
    responder link with an allowed account. An inactive author button is
    expected.
[ ] If folder creation or a respondent upload fails, check whether the
    destination is the owner's OneDrive or a group's SharePoint site.
[ ] Ask the administrator to check folder creation, permissions, and
    disabled or expired organization sharing links for that destination.
[ ] If the form moved to a group, record old responses and destinations
    before recreating questions. Old files stay in the previous location.

AFTER ANY FIX
[ ] Submit one small permitted file using an intended respondent account.
[ ] Confirm that the response is recorded and its attachment is present.
[ ] Ask the intended reviewer to open that attachment from their account.

IT TICKET TEMPLATE - REPLACE THE BRACKETS BEFORE SENDING
Subject: [Google / Microsoft] Forms file upload failure: [exact message]

Form link: [link shared only with authorized support staff]
I am the: [form owner / respondent / reviewer]
Where it fails: [adding question / attaching file / opening saved file]
Exact error or disabled control: [text; redact screenshot if needed]
Started at: [date and time, including timezone]
Scope: [everyone / particular account / particular device]
Audience: [internal / external; whether the affected account has access]
File used for the test: [extension and size; do not attach sensitive files]
Storage destination: [My Drive / shared drive / OneDrive / SharePoint]
Recent changes: [form move / account / sharing settings / none known]
Small allowed test file result: [worked / failed, with exact message]
Please check: [the platform-specific items above]

OFFICIAL SOURCES
https://support.google.com/docs/answer/7322334?hl=en
https://support.google.com/docs/answer/15473134?hl=en
https://support.microsoft.com/en-us/forms/add-questions-that-allow-for-file-uploads-in-microsoft-forms
https://learn.microsoft.com/en-us/troubleshoot/microsoft-365-apps/forms/resolve-file-upload-errors-forms

Build your own file upload form in Thunder Forms:
https://www.thunderforms.in/dashboard/builder/new-form?template=file-upload

Preview the template's fields and limits:
https://www.thunderforms.in/templates/file-upload
Thunder Forms sends uploads to the owner's selected Google Drive folder.
Respondents do not need accounts. The maximum is 12 MiB per file, with up
to 10 files per upload field. The template starts with one file per field.
Only the owner connects Drive. Check those limits before switching
collection methods.