Thanks for your reply.
> it's a personal account and is synched with my computer.
<< Since you use OneDrive for personal, you may not find the second-stage recycle bin at the bottom of the Recycle Bin page. Generally, this is visible to OneDrive for Business users.
If synched with your computer, when you delete/remove files in OneDrive from local computer, it deletes it from your OneDrive everywhere.
> I've tried to restore my files but must be older than 1 month. My recycle bin don't have the files.
<< This is an expected behavior of Microsoft. If you have tried the methods above, you may not find your missing files.
For personal suggestion, it is recommended to specify which folders you would like to sync instead of all folders.
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