Share files between iPhone / iPad and PC without iTunes installed on PC?

How to View Files from Your PC on Your Mobile Device:

There are several free apps that will allow you to view files on your iPhone of iPad without syncing to iTunes on a PC.

THE EASIEST WAY: Dropbox (http://dropbox.com).

STEP 1: Download the Dropbox free application from the App Store to your iPad or iPhone.

STEP 2: Sign up for a free Dropbox account (https://www.dropbox.com/register). This will provide you up to 2GB of transfer space.

STEP 3: Upload files from your computer via the web interface to your Dropbox account. Those files will immediately be available on your iDevice via the Dropbox app.

How to View Files on Your Mobile Device from Your PC:

You can also get files from your mobile device into you Dropbox account in order to view them on your PC by following these steps:

STEP 1: Open the Dropbox app. Sign-in if necessary with your account name and password.

STEP 2: Tap the 3-dot icon at the top right-hand corner of the screen per item #2 in the screenshot below.

STEP 3: Tap "+ Add Files" per item #3 on the screenshot above and add files from your Photos, Cloud, etc.