An early 230MB removable hard drive from SyQuest. The EZFlyer 3.5" drive superseded EZ135, which was the first of a new family of economical drives geared to the home market in 1995. EZFlyer drives supported EZ135 cartridges but were not compatible with SyQuest's original 3.5" format. See SyQuest disk
and magnetic disk
Although EZFlyer cartridges resembled SyQuest's original 3.5" format, they were keyed differently and would not fit in the wrong drive.