Yes, your shed does need a base. This is to give it a solid, level foundation. Open soil will not help with the longevity of the shed itself or the contents within. The best materials to use to make your shed base are concrete, natural stone or wood.
Lochailort
Lochailort is a district in Scotland that lies at the head of Loch Ailort, a sea loch, on the junction of the Road to the Isles (A830) in between Ft William and Mallaig with the A861 in the direction of Salen and also Strontian. It is served by Lochailort railway station on the West Highland Line. Neighboring is Lochailort Inn, a public house, and also Our Lady of the Braes, a small Roman Catholic church that was consecrated in 1874 yet little previously owned given that 1964 as Sunday Mass is celebrated in the church at Inverailort House which lies on the opposite side of the loch.