Clip Zip SDXC Card Support?

I re-tagged all MP3s to v2.3 ISO-8859-1 by means of MP3Tag – to no avail: The player is still slow, with more than 20 minutes for refreshing and 5 seconds for skipping in shuffle mode (exept for tracks on the internal memory, with which reaction time is normal, i.e. <1 s) – and this with further reduced SDXC card charge, now only 29.5 GB.

@koto wrote:

Clip Zip 8 Gig and a Patriot LX 32 Gig Class 10 Card work. 4500 Files. Original Firmware. Database rebuild take 2-3 Minutes.

Hard to believe! All my SanDisk Players (2 Clip+, 1 Clip Zip) regularly take about 15 minutes for database refreshing with 8 + 32 GB. Files are LAME-based MP3s with simple tags and without album art.