One of the major downsides of Apples iPhone and iPad is the lack of a proper USB port to easily view and transfer files. However, the iFlashDrive will solve that problem. Save your files like you would on a regular USB drive, connect it to your device by plugging it in the 30-pin or Lightning dock connector, download the iFlashdrive app and you are good to go.
Supported file formats include
for pictures: BMP, TIF, TIFF, XMB, GIF, ICO, CUR, JPG and PNG
for video: MPV, M4V, MOV, MP4
for audio: MP3, CAF, ACC, AIF WAV AIFF and M4A
The iFlashDrive is available in a 8GB (30-pin) and 16GB (Lightning) version. You can cop one over here.