Hey there @Leti_19,
If it's a shared folder that you own, you will need to unshare the folder to remove this from the accounts of other members. If you've already deleted the folder from your account then you will need to navigate to the Sharing tab here and then click the "..." next to the folder to unshare it.
Please note that to do this you will need to be the owner of the folder. If you aren't you will need to remove access to the folders with the steps outlined here.
That being said, so that I can have a better understanding of your current situation, can you let me know the exact steps you took when trying to delete the folders?
Let me know - Thanks!
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