IT depends on what "data" you are asking about.
if you are having storage issues on your phone, I would be happy to make suggestions.
You can store pictures and documents in Dropbox or Google drive. These are cloud storage apps that keep your information stored off the phone, but available any time. You can send pages documents to either app in a different format for editing.
make sure you delete old messages, phone logs, email, as they take up space also.