Can't drag-and-drop file

Hi Абдурахманова Аліна Арсеновна, 

Typically, "Red Cross" means sync issue with the OneDrive you are using with local storage. So, the idea is you can perform some methods to try to reset the syncing process, whether it's OneDrive application or web version to connect them with local storage.  

And as I mentioned above, you can try unlinking your PC from File Explorer in Windows.

You can see the OneDrive tab and right click on it to find the OneDrive settings tab.

• Right-click the icon and select Settings. 
• Click Unlink this PC. 
• Follow the prompts to relink your PC and sign back into OneDrive. 

On your OneDrive browser, you can also navigate to the Settings button next to your profile icon as I show you in the image below.

Choose "Sync this OneDrive" and follow the instruction to force sync your OneDrive again.

Sometimes, it helps to remove problem files from the OneDrive folder first then refresh the syncing process and fix the issue. 
Refer to: https://support.microsoft.com/en-us/office/fix-onedrive-sync-problems-0899b115-05f7-45ec-95b2-e4cc8c4670b2

OneDrive has some restrictions that can block the syncing of your local files and folders to the cloud. For instance, file and folder names shouldn't have invalid characters like ~$ at the start or include vti, .lock, desktop.ini, AUX, COM0 to COM9, CON, LPT0 to LPT9, NUL, and PRN. Try renaming them to see whether this fixes the issue. 

If that isn't the case for you, check the extension of the file with a red X mark. Temporary files (.tmp) aren't supported for syncing, so you should just move them out of your OneDrive folder. If you really want a copy of them in the cloud, you can just upload it yourself via the OneDrive website. Besides file names and types, make sure to look at the size too. You can't sync any single file that's over 250GB. 

Another thing to consider is the file's permissions. Both Read and Write permissions need to be able to sync the file. Follow these steps to check: 

Go to the file in File Explorer. 

Right-click on the file. 

Choose Properties. 

Press the Security tab at the top. 

• Under Group or usernames, click on your name. 

Check the Read and Write permissions. 

Both should say Allow. Otherwise, hit Edit, check Allow for both Read and Write, and click on Apply to save the changes. From here, wait for OneDrive to start syncing the file again.
Please feel free to reach out to me if the issue continues after trying them.

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