Tethered means to physically attach your device to your computer using the USB cord.
You can use the tethered or the over the air (untethered) method. Now that you have your Calibre database set up just the way you like it, you need to figure out how to get the books from your computer to your device.
JanuGetting eBooks from Calibre to Your Device Using Send to Device and the Connect/Share Functions.
