Here's a program you can load (ymodem.spin) that will let you transfer files from an SD card attached to a Propeller over serial to a PC. I've tested it using ExtraPutty on Win10 with Activity Board WX.
It's not really optimized, but still achieves ~1.5kB/s transfer rates at 115200 baud.
You can also view the SD card root directory and erase files using HyperTerminal or ExtraPutty
Note that you don't have too long to select a file to send or save to location before it times out...
This can be useful in cases where it is inconvenient to remove the SD card from the Propeller...
Ymodem is better than Xmodem because you don't have to say the filename twice and the filesize comes out excactly right.·
(but zmodem is better...)
The YModem2 is the 2019 update. Updated FSRW to 2.6 and change default pins to match Activity Board WX.
Note: cheezus also posted a new version, look down a few posts here.