In Teams, navigate to the Teams tab and click on your team's space.
On the ribbon located above the chat, click on Files.
On the toolbar located above the file share, click on Open in SharePoint. This will open a new tab in your browser.
In SharePoint, click on the ellipsis (...) located on the toolbar above the file share and click on Alert Me. This will open a pop-up named Alert me when items change.
In the Alert me when items change pop-up, you can set how, when, and where you would like to be notified when a file change is processed.
Alert Title
Enter the title for the alert. This is included in the subject of the notification sent for this alert.
Delivery Method
Specify how you want the alerts delivered.
Text message
Change Type
Specify the type of changes that you want to be alerted to.
All changes
New items are added
Existing items are modified
Items are deleted
Send Alerts for These Changes
Specify whether to filter alerts based on specific criteria. You may also restrict your alerts to only include items that show in a particular view.
Anything changes
Someone else changes a document
Someone else changes a document created by me
Someone else changes a document last modified by me
When to Send Alerts
Specify how frequently you want to be alerted. (mobile alert is only available for immediately send).
Send a notification immediately
Send a daily summary
Send a weekly summary
Once you have set the alert options, Press OK.