Because the ACE 721 uses a USB-to-Serial bridge, you usually need one of the following two common drivers. Check your device's manual or the chipset if possible, but the is the most common for this model.
Most 721 cutters use the FT232RL chip.
USB driver for SignCut-compatible cutters. ace 721 cutting plotter driver free download
To recap, a legitimate is available, but you must avoid third-party driver databases. Your safest options are: Because the ACE 721 uses a USB-to-Serial bridge,