A Microsoft file hosting and synchronization service.
Hi, Lisa R_915
Thank you for using Microsoft products and posting them to the community.
You start by trying the program in the following article:
Find lost or missing files in OneDrive - Microsoft Support
If none of the above options work, it is recommended to contact the OneDrive support team directly to recover your data as long as they still have your data retained:
Here is the link to send an email to the OneDrive support team:
https://go.microsoft.com/fwlink/p/?LinkId=528676
Need to make sure you visit onedrive.live.com using your browser - click on the link - and it will automatically bounce back to your OneDrive web side and allow you to send the email.
I hope the above information can help you. Feel free to send a message if you need further help.
Best wishes
Aiden.C - MSFT |Microsoft Community Support Specialist