How do I transfer data from pc to amiga? And what software to use?

[Speelgoedmannetje]

I can highly recommend AmigaExplorer from Cloanto.
With it, the only thing you need is workbench 1.2 (or 1.3, I don't remember) on a plain Amiga 500 or 1000...
It has a step-to-step manual on how to get the transfer utility on the amiga (using a serial null-modem cable).
It even works flawlessly with current usb-to-serial converters. :-)