If it won't load the directory, then the diskette is either corrupted or was never formatted. Text files would have just been a text type file rather than binary, unless he used a special word processor and these are savw file disks in a different format.
If you happen to have a copy of KwikCopy (I think) you can read bytes on the disk by sector. If there is actual ASCII text you will see it show in the hex editor panel.
