This is not possible if the disk image file is not publicly available on your Google drive, saying that there is a trick to overcome i.
First, make sure the image file is temporarily open on your disk. You can also do this through the application script by changing the file permissions to DriveApp.Access.ANYONE , DriveApp.Permission.EDIT . Then the disk file looks like a file as if it were from the Internet. Then you can add a drop.
After that, you can decide two things. Change the permissions back or delete the image file from your disk (if you want to use it only built-in to your blob-object (also, if you want, through the application script code)
good luck
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