These samplers use proprietary CD-ROM and floppy disk formats that can't be read by Windows.
It is thus necessary to talk directly with the floppy disk or CD-ROM hardware.
For CD-ROMs use
I/O → Read from Sampler CD to import files from such CDs.
For floppy disks, you'll have to use free 3rd party programs (search for ADISK or AkaiDisk) to transfer stored the files to the PC, also see .AKAI format.