After obtaining the system's hard drive, which volatile memory should David acquire for forensic purposes, considering that the necessary forensic data is stored on the drive?

The data saved on a disk drive is relatively stable compared to other items in terms of volatility, but backups are even more stable. This implies that David should prioritize taking backups after creating an image of the disk drive. Additionally, if Daivd requires CPU cache, registers, and system RAM, he should capture them first.