Set the Serial preferences as follows..
Baud Rate = 19200 Buffer Size = 4096 Read Bits = 8 Write Bits = 8 Stop Bits = 1 Parity = None Handshaking = RTS/CTS
The transfer is most reliable at 19200 bps, any higher and the data sent may be more or less than expected.
Install ADF Sender Terminal and configure the serial preferences to match the Amiga's, then open the Comm port.
PC ADF → Amiga DF0:
Amiga: [CLI/SHELL] transdisk -w ser: -d trackdisk 0
PC: [ADF Sender Terminal] Press Send and select the ADF you wish to transfer to the floppy disk in drive DF0:
Amiga DF0: → PC ADF
PC: [ADF Sender Terminal] Enter the size of the destination file, for every track it's 11264 bytes, so tracks 0 through 79 is (11264 * 80) 901120 bytes, then click on Receive.
Amiga: [CLI/SHELL] transdisk >ser: -d trackdisk 0
Both scenarios should return to the command line after the transfer completes, if either stops short then you should consider lowering the Baud Rate. Although i have been able to transfer at 115200 bps without errors using Transwarp in place of Transdisk.
If you don't possess Transdisk/warp and or have no way of getting it over to your amiga, refer to this page http://adfsender.stoeggl.com/adfsenderterminal/methods.html