Best Places to Advertise Single Storage Unit?

[Tim Porsche]

Hi All, for those of you who own storage units, what venues\sites have you found to be the best for marketing your storage units? I currently only have one storage unit right now which is part of a duplex property I bought. The only places I have been advertising are on Craigslist and a few local RE Facebook groups. Results have been OK so far but not great. With my normal rentals I have various sites I upload the listing to such as Zillow, Trulia, Hotpads, etc. I'm having trouble finding similar sites for advertising storage units though. Any feedback\suggestions would be greatly appreciated. Thanks in advance!