Delete Excel Spreadsheets through Windows instead of WEBI?

Hello,

Our BO server is quickly filling up by spreadsheets being saved to the server every day going back several years and we want to delete many of them and my question is can they be deleted safely using Windows instead of Webi?

We want to use Windows instead of WEBI because it looks like we can only delete 1 spreadsheet at a time using WEBI.

Thank you,

Elliot Semmelman