Hi Vanessa,
Thank you for posting, I am here to help. Your Microsoft 365 data, documents is stored in your Computer inside My Documents, Desktop folder, Local Drive storage and OneDrive folder.
To check please follow this steps:
Click start button and search file explorer.
One File explorer window open on the left pane check the following folders.
OneDrive
Desktop
Downloads
Documents
Pictures
Music
Videos
Check every folder for your files. Check the dates to see the most recent updated document / files.
looking forward to helping you out. If you need more help please let me know. If the answer is helpful, please click "Accept Answer".
Best regards,
Jansher