The statute of limitations is 4 years for most felonies. They can hold your stuff until they complete their investigation within reason.
If you were not arrested the police could investigate without charges for years but that's not going to happen
Hire an attorney immediately.
Make sure you tell him about the contents of your computer and any reasons your home might have been the subject of a search warrant.
This is not a statute of limitations question. The S/L for 1st degree felonies is 4 years, and for 3rd degree felonies it is 3 years. They cannot use information that is more than 30 days old in obtaining a warrant. The answer is a reasonable amount of time. Hire an attorney now.
R. Jason de Groot, Esq., 386-337-8239