Grey Samsonite carry-on luggage with red tag

I lost my gray 21-inch Samsonite carry-on luggage, a hard-shell bag from the Samsonite lineup, yesterday around 3pm near the CSU Transit Center on College Ave, just north of Old Town Fort Collins. It's mostly gray with scuffs on the corners and a bright red zip-tag that sticks out when you grab the zipper. There's a blue repair sticker on the front panel and a tan leather luggage tag on the handle. Inside I have my travel notebook, a few outfits, and a USB drive with family photos; it has sentimental value and I really need it back before my next trip.