Guide
What is the file size limit in Teams?
100 MB in a chat, 250 GB per file in a team’s files, stored in SharePoint, according to Microsoft. For someone outside the organisation, a link: up to 5 GB here.
The Teams limit, plainly
| File in a chat | 100 MB, 10 attachments at most |
|---|---|
| File in a team’s files (channel) | 250 GB per file, stored in SharePoint |
| Teams for personal use (free) | 5 GB of storage to upload and share; once full, no more attachments |
Sources: Microsoft Learn, Microsoft help — October 2026.
How to send bigger
A TransferThing link
For someone outside the organisation: drop the file here, paste the link in the chat or an e-mail. Up to 5 GB, without an account, and the recipient downloads in their browser, without Teams.
Share it from the team’s files
Inside the organisation, share it from the team’s files or OneDrive rather than attaching it to the chat: 250 GB per file in a team’s files, according to Microsoft.
Zip or split
A .zip barely shrinks videos, photos or PDFs. Several files under 100 MB work, but the recipient has to put everything back together.
A free account to follow your transfers.
See what was downloaded, and find your links again.
Frequently asked questions
What is the maximum file size in a Teams chat?
Microsoft lists a file size limit of 100 MB for chats, and 10 attachments.
And in a team channel?
A team’s files are stored in SharePoint; Microsoft lists an upload limit of 250 GB per file. A guest can attach files in channel posts only.
How do I send a large file to someone outside the company?
Drop it on TransferThing and paste the link in the chat or an e-mail: up to 5 GB, without an account. They download in their browser, without Teams.
My 5 GB on free Teams are full: what now?
According to Microsoft, Teams for personal use gives 5 GB of storage to upload and share documents; once full, you can no longer attach files. A TransferThing link does not use that storage.
Why 100 MB in one place and 250 GB in another?
Microsoft lists 100 MB for chats and 250 GB per file for a team’s files, stored in SharePoint.
New transfer
Add your files
Add your files
One file, fifty, or .
- 5 GBper transfer, free
- 200files, folders included
- 3 daysthen everything is erased
- No accountnothing to create