The last option is highly recommended for basic Windows Mobile users. If the options above are not available or simply do not make you comfortable you can turn to Windows Mobile utility software for help.
There are several Windows Mobile cleaning utilities available that will also allow users to format inserted storage media.
In order to find the programs in question users may browse the Windows Marketplace, or search using a favorite search engine. There is also an extended list of utility programs for use with Windows mobile devices which can be found here.
Some of the best available programs include SKTools, Flash Format, Pocket Mechanic Pro, and Storage Tools for PocketPC.