Use a garden fork or spade to lift clumps of snowdrops. Dig deeply all round the clump, before levering it out in order to get down to the bulbs.
Divide the snowdrop clumps by tearing them apart. This can be done when they are in leaf or even in flower. Pick off flowerheads to conserve the energy in the bulbs.
Use a hand trowel to replant small clumps of six to eight bulbs. Make the hole 10cm - 15cm deep and place the bulbs at the base of the hole. Fill around the bulbs with soil taken from the hole, ensuring that some of the leaf is above the surface.