Originally Posted by
PJD1
If you are accessing your email via a web browser then your emails are not stored locally on your hard drive, they are stored on your email providers servers. Reformatting your hard drive will have no effect on them.
Yahoo mail IS web based so emails are sited on the Yahoo servers.
Simple check, don't know how old your machine is but try scrolling down your sent folder, on mine I can find emails I sent 10 years ago which is the pc before my present one and I didn't do any email back up. Documents and photos etc obviously do need to be backed up.
Regards