A:AnswerYes it is! Here are the storage options:
Multiple storage options: Up to 1 TB PCIe® NVMe™ TLC M.2 SSD or 512GB
Intel® SSD + 32 GB Intel® Optane™ memory or Two 512 GB PCIe® NVMe™
TLC M.2 SSD with RAID 0 configured
A:AnswerYes. Here is a link to HP's global warranty information:
https://support.hp.com/us-en/document/bpr01266
The power adapter can work in other countries with different voltages, however, you may need to purchase an adapter for the US 3 prong plug depending on the country you are in.
A:AnswerI liked the way it sounded. It is full, not tinny sounding typing laptop speakers. I am not 100% sure about the specs, but I believe they are 2 x 2w modules. I'd rate them 7/10 (which is great for windows laptops).