If I am understanding your question, to delete attachments you have saved, go to Files, Downloads and select the item to delete. Press delete. Note that it will likely do into a recycle bin for 30 days in case you change your mind and wish to restore.
I am not employed by Samsung nor do I receive any remuneration as a Samsung Members Star.
To change the name of a file or download, go to File, downloads then find the item you wish to amend, press and hold so you'll get a dot in the top left of the item. Click on the 3 dots. Select rename. Change the name and save
I am not employed by Samsung nor do I receive any remuneration as a Samsung Members Star.
I have files in my email, I want to either delete the whole file or change the name. Eg emails to do with booking a cottage to stay in, I need to keep emails safe until after we've been then either delete or use for next time