3.5 floppy imaging

IF they are just plain old DOS format (DD or HD), then COPY will do. IF they are just plain old DOS format (DD or HD), then there is no reason to "image"! IF they are just plain old DOS format (DD or HD), then the files are all that matters. IF they are NOT just plain old DOS format (DD or HD), THEN there might be reason to image, such as if they are some unknown and not understood format, and the files can not be extracted, or there is reason to believe that there is some form of information in the structure and format of the disk that should be preserved, such as system tracks on CP/M disks, etc. Or, if they are copy-protected, and stuff other than the files needs to be preserved to be able to use the files. 'Course then, your "imaging" methods are not likely to work, anyway. But, IF they are just plain old DOS format (DD or HD), then there is NO information other than the file content on the disks. If you format a 3.5" disk in a DOS/Windoze machine, and copy some file onto it, . . . Could you please explain to me WHY you would want an "image" of that disk?