I have a Viking, Husqvarna disk and floppy for "Sensational Needle Effects". It is for use with twin and wing needles. I cannot use it with my machines. I purchased it years ago and have no use for it. What machine is it designed for??

That would be for the Husgvqarna machines. It should have the HUS, VIP or VP3 formats. If you have software you can probably convert to your formats. This is one of the older deisgns # 156. The reason foir the floppy and disk is because the floppy was to be ued n the Older Designer machines...The disk is so that yu can use in the software.