Yes, since the Trinity (and later Triton) use standard MS-DOS format floppy disks, the USB floppy drive you linked should work just fine. However, you may want to consider instead modernizing your Trinity by buying and installing into your Trinity a similarly-priced Gotek USB floppy emulator so that you can use USB flash drives directly in your Trinity (instead of floppies), which you load/save on your Win/Mac/Linux PC with Trinity Program/Combi/sequencer PCG data. This makes it easy to use your PC as both an extra backup device for your data, as well as a convenient way to bring over data (sounds) you download online into your Trinity. The Gotek will NOT improve load/save times over floppies since it merely emulates the floppy exactly, but with the other benefits of USB flash media convenience/stability/management.
Unfortunately, the Gotek has some compatibility glitches which generally are not a problem, and you will have to open yout Trinity and install the Gotek (which is not very difficult).
With the Gotek, you have the option of leaving the standard Gotek factory firmware (which basically works because the Trinity floppy uses MS-DOS format), or else spend some time enhancing the Gotek.
First, you can flash the Gotek with an alternate firmware like free FlashFloppy or HxC (which ususally costs a few dollars, but may have extended Trinity support). The alternate firmwares offer greater programmability/customization options.
Second, the alternate firmwares also allow you to install inexpensive hardware enhancements to the basic Gotek drive like a graphic OLED display and/or rotary pushbutton encoder.
If you choose, you can spend a bit more (aboput $50) for a newer enhanced FACTORY (NOT reseller upgraded - watch out!) Gotek drive that already has the display and encoder hardware upgrades, as well as a faster processor and more RAM memoprt, along with FlashFloppy already installed.