If you make the index too large by including the entire hard drive, or to many folders, then your searches will slow down and take longer for the search results to display. You will also find your hard drive running longer and more often in the background while the index updates itself for changes made to the included folder locations. For the best results, it is recommended that you only add folders that you search frequently to be included in the index.
The index will not include search results from any drive or partition with the
A and
B drive letters, even if you add their location to the index. This is because the A and B drive letters are reserved for floppy drives. Since a floppy drive is considered to be a removable device, it will not be indexed. Even if this is a hard drive you assigned with the A or B drive letter, it will still be treated the same.