I have been lucky to avoid Matlab for a longtime now. However I need to export for my colleague such a list which is ,are of 384 list of 8 disks coordinate and radius.
What type of Export Format would be a convenient for her to draw those back from Matlab ?

Exportcan export to Matlab’s .mat files (version 4). I suppose your colleague should be able to import those.Matlab also imports text files and some spreadsheet formats. Therefore, Mathematica’s export in the CSV, TSV and XLS formats should work as well.