Refresh SD card

Ubuntu 16.04 and latest Smoothieware.

I can see the SD and I can save gcode files to it from Slic3r-PE, then going to the LCD menu and "Play" I cannot see the files. Is there some way to refresh the SD card? Thge files are actually there as I can take the SD card out and use a reader.

OK, just thought I'd try shutting it down and restarting from cold in the hope it would read the card, is there a specific .gcode or something extension I have to use in the file names? It does show the "delta.grid" file name though. ?????

Thanks

You're saving the files to SD directly from Slic3r?

I made a directory on C: to save files to from slic3r, then use the web interface via browser to upload a file..perhaps the issue..

Thanks for the reply, but the printer is not near our home network. And, with Ubuntu/Linux, not quite the same as saving to the drive "C"

I get that man, but surely there's a directory structure in Linux that you can write a file to, yes?, or does the web interface not play nice with that?