There is not enough real memory to work with a disk that size (virtual memory doesn't count). Try closing any other open applications and then run DiskCopy again. The image has an unknown compression type (later version of DiskCopy?). The image file appears to be damaged. The disk was duplicated successfully ”) (loaded from image file: “ (read from floppy disk) Stop Copying Make Some Copies Make A Copy The master disk can NOT be duplicated on a High Density (HD) disk The master disk can ONLY be duplicated on a High Density (HD) disk The master disk can only be duplicated on a SuperDrive (FDHD) The master disk can not be duplicated on a single-sided drive It is not possible to print a Disk Copy document. Open a document to use it for duplication. The disk format in the image file is of an unknown type The disk is write-protected! , data chksum= , tag chksum= Checksums don't match: image file is probably corrupted Not enough memory to perform that operation bytes Total available space = ) occurred while copying/verifying the disk An error ( Now copying and verifying a disk… Please insert a disk to COPY ONTO… ) occurred while saving the disk image An error ( .image Save the disk image as: ) occurred while reading the disk image An error ( The master disk has an unknown format. Reading the master disk image into memory… There is not enough available memory to work with a disk that size (800K Apple II) (1440K/HD) (720K) (800K) (400K) -not a Macintosh disk-