HP CD52 External CD-Writer Series - Manual (Page 94)

Nero Express Preferences • 94
10.3 Cache Tab
Path for cache – You can select the directory and path for the cache. This is
important since you will be using this space as a temporary cache when burning
large files or full discs. It can help prevent buffer underruns.
Test all drive speeds – You can test all hard drive speeds on your system for
performance.
Minimum disc space reserved – Reserve the minimum disc space for your cache.