What is the test for a motion to suppress or suppress evidence that was seized under a search warrant?

Brobst argues that the seizure of computer-related items, compact disks, floppy disks, hard drives, memory cards, DVDs, videotapes, and other portable digital devices lacked probable cause. We review the district court's denial of a motion to suppress evidence de novo. United States v. Meek, 366 F.3d 705, 711 (9th Cir.2004). We also review a magistrate's finding of probable cause to issue a search warrant for clear error, and we give "great deference" to such a finding. United States v. Hay, 231 F.3d 630, 634 n.4 (9th Cir.2000).