A:AnswerThis model first started shipping in July 2019, but we would need the serial number to determine when it was manufactured. Yes, this model has RGB keyboard backlighting.
A:AnswerYes, here is the link where you can view all the models: https://www.acer.com/ac/en/US/content/predator-models/laptops/predatorhelios300 Just click on the More button to see the specs.
A:AnswerMost any USB or wireless mouse should work fine, as well as the headset of your choice. You might also post your question on the Acer Community where there are many users that post questions and offer help and advice on Acer products. The link is: https://community.acer.com/
A:AnswerBased on the information provide your laptop is in need of repair for the hard drive. To get to support please call 866-695-2237; their hours are 6am-5pm CST, Mon-Fri. https://www.acer.com/ac/en/US/content/service-contact
A:AnswerNo, this Predator model has a 60hz LCD panel and is not interchangeable or upgradeable. If you need a 144hz laptop we recommend a model such as the PH315-51-78NP; specifications can be seen here: https://www.acer.com/datasheets/2018/4876/PH315-51/NH.Q3FAA.001.html