I've long been trying to find a way of transferring files from PC - Amiga and vice versa.
It depends on how eimple or complicated you want to make it, but you can either copy ADF 2 Disk onto a 720 (Double Density) PC formatted floppy. The floppy can be read on OS3x using the PC0: commodity.
You can also burn your files onto a CD ROM on the PC side and read that on an Amiga.
I've dabbled with networking etc with no results and the best solution for me was to read my Amiga's hard drive using WinUAE. There's no need to format the device, just attach it to the PC's IDE chain and you can use the disk menu in UAE to read it. AFAIK you can write too.