Size limit of 250 MB issue

I tried to upload a font to my asset folder but received the response:
“Error: You cannot upload any more files. You have reached the total size limit of 250 MB. If you would like to upload more, please remove the ones you aren’t using anymore by in your assets.”

My asset folder continues to display a total of 344.86 MB (138%) though I deleted many files and calculated that it now totals 187.57 MB, far below the 250 MB limit. Wondering if the system takes time to refresh or if there is another reason my storage remains stuck at 344.86 despite my having reduced it through file deletion.