Welcome to the Excel Community

Asking questions is what this forum is (mostly) about!
Near the top of the main page...

* You can use Microsoft OneDrive or Google Drive or Dropbox or ...  BE SURE TO SET SECURITY such that everyone can read the file, but noone but yourself can edit (change) it.
... While files can be attached to a post (and to replies to a post), it seems that "newbies" such as yourself are not immediately permitted to do so.  (And since the forum software was supposedly "improved" in November 2025, many members have found that the file they attach disappears.)  So you would be taking a chance by assuming you could attach a file to your first few posts.  Many people instead insert an image (a partial screenshot) in their post, though that is not as useful as a file.
** Include information about which Excel product (Excel 365, Excel 2019, etc.) you are working with, on which platform (Windows, Mac, the web, Android...).  If you are not confident in the clarity of your question, describe what you are attempting to do, in general terms.  If you find an old post (say, older than 6 months) that is relevant, include a hyperlink to it and explain why the responses to it do not resolve your issue (avoid the temptation to add a reply to it).