Im have test it. My Sample Time. Clip Zip 8 Gig.
Internal Rebuild take 40 Second with 926 Files, 104 Folder and 5,72 GB (6.143.737.856 Bytes)
My Card is a SDHC Patriot 32 Gig LX not SDXC and a Class 10.
3.428 Files, 216 Folder, 21,7 GB (23.353.688.064 Bytes)
Total Scanning Time.both, 5.44 Minutes.