Storskär has operated for Waxholmsbolaget and her predecessors since 1939, and is today one of that company's classic fleet, alongside Norrskär and Västan.

As delivered she had a Lindholm triple expansion steam engine of 660 horsepower (490 kW) and, during trials, attained a speed of 14.5 knots (26.9 km/h; 16.7 mph).

The ship was sold in 1918 to Ångfartygs AB Drottningholm-Fittja, which in 1925 changed its name to Trafikaktiebolaget Mälaren-Hjelmaren.

In December 1939 she was purchased by Waxholms Nya Ångfartygs AB, better known as Waxholmsbolaget, who gave her her current name of Storskär in May 1940.

Today, along with Vaxholmsbolaget's other classic ships, she is in regular traffic between May and September, serving the route from Stockholm to Vaxholm and other central archipelago islands.