The +Drive gives a significant boost to the Machinedrum and Monomachine storage capabilities. Everything is basically multiplied with a factor of 128. Thousands of patterns, sounds and songs can be stored internally and more or less instantly recalled. The Machinedrum SPS1-UW+ MKII can now host over 6000 samples. The Monomachine SFX-60+ MKII can be loaded with more than 8000 user waveforms.
Elektron has started a dedicated +Drive Upgrade ‘frequently asked questions‘ page on their website. So if you have any questions, most certainly Elektron will have the answers!