You can use the SD Transfer Utility to transfer files to and from your SD card to your vintage Macintosh. Learn how to use the SD Transfer Utility here.
Emulators that support “drive” based images can mount BlueSCSI images as well!
NOTE: Mini vMac does not work with drive images.
CiderPress is a Windows utility that allows you to add or remove files from a HFS image. Runs fine in Wine too.
Old versions of Disk Utility on MacOSX can mount these HFS images if the file extension is