For a PC you can install iTunes (in the Microsoft Store). It will allow you to sync data with your PC→Sync your iPhone, iPad, or iPod using your computer - Apple Support. There are also 3rd party apps such as TouchCopy and Imazing for Windows (or Mac).
With an Internet connection (which you have with cellular data on your iPhone) you can use iCloud for Apple devices. Go to Settings/[your name]/iCloud and turn on the switches for the data you want to share. You should also get iCloud for Windows to view and share the content with a PC. iCloud is built in to Macs. You can also view it with any web browser at https://icloud.com.
There are also excellent 3rd party sharing solutions that also require Internet (however, if you have a iPhone you have Internet through cellular data):
- Dropbox.com
- Box.com
- Microsoft OneDrive
- Google Drive
- Livedrive Briefcase
All of them have free apps for iPhones (and Android phones) as well as Windows & Macs (and Linux).