Most likely, all sectors of the virtual hard drive will be touched when the guest is running, so all pieces of the file(s) will have the current date/time as last accessed.
The benefits of splitting the virtual disk into multiple 2Gb sliced files is: file copying/archiving, shrinking, resizing. All operations like that will only need 2 Gb plus a small additional overhead on the host of free space. If you have the disk as a single file, you need as much free space as the max. size of the disk! Also, splitting it creates the disk descriptor file as a separate file, instead of embedded into the single file - making troubleshooting disk repair MUCH easier (the separate descriptor file).
Thanks for the reply, but that's why I am suggesting it should be a feature request if it is not currently possible.
Player will know which files it has Modified during the session and only write those changed ones back out. Then at closing the VM, adjust the DateTime of the untouched files back to their Date when Player launched the VM. That way a backup checks that date and sees that those files do not need updating on the backup drive.
As it is now, all files get Today's date and thus all files are backed up, even though a lot of them are totally unchanged.
I am a retired programmer and I hate working for software when the software should be working for me.