Bill,
I just formated an SD in the 2600 and saved a Test Song. I always format the SD on the 7000 or 2600 before using.
Put it in the computer reader and it reads Private, Technics, KN 7000 and Test Song.
I made some tests for Fred when he was developing the tool on my 2600. It was confusing to Fred and I when no 2600 came up. Technics used the same 7000 SD format for the 2600.
I changed from a dual reader Sandisk USB 1 to a PNY USB 2, SD and MMC reader. On first use it restored a 128 in about 1/2 hour, 5 times faster than the Sandisk USB 1. On my second use restoring the same 128 it took over 2 hours.
I know my problem lies in the computer USB card and not in the reader or 7000 Explorer. My computer is 2 years old and the USB has been a problem from the start.
It is important that your computer have a USB 2 card and the reader used also be USB 2. A miss match in card and reader speed will reduce the read times substantially.
Fran in Florida