A Microsoft file hosting and synchronization service.
Hi Liudmila Loktionova,
Welcome to the Microsoft community.
You're experiencing a recent OneDrive hot issue: some users have recently reported in the community that they are unable to use storage in the OneDrive while their storage is still available.
This is a pending fix for a storage space validation exception, and I'm sorry to hear that this is happening to your account as well.
This is a support community and is not authorized to directly fix or check your account to investigate the issue, the proper way to submit a case and report this issue is to get in touch with the OneDrive support team directly.
You can send an email to the OneDrive support team by clicking the link below: https://go.microsoft.com/fwlink/p/?LinkId=528676P.S. Before clicking on the link, you need to visit onedrive.live.com with your browser and sign in with your Microsoft account, and then clicking on the link will automatically redirect you to the OneDrive webpage to send an email.
I hope this is helpful.
Best regards
Ian - MSFT | Microsoft Community Support Specialist