This app is so amazing. You connect to a wifi network, then on a computer that is connected to the same network open up your browser then type in the address the app gives you and bam it allows you to upload files onto your iphone/ipod touch wirelessly. Its a wireless flash drive!!!
Best of all it is free.
TO DELETE A FILE: you must use the app to delete a file not the browser, just slide your finger left over the file you want to delete and a delete box will appear. Then just click delete.
A bit confusing.
WiFi HD - Instant Hard Drive SMB Network Server Share