Can I upgrade to bigger hard drive myself when the sold along with the InAnOn karaoke machine is running out of space? What type of storage drive does v5 model uses, and is there instructions that shows us how to do it? Can we still play the downloaded song in the event lose internet connectivity?

Yes you can. Just copy everything from old hd to the new one. But technically you don’t need, machine will automatically cleanup songs you don’t use and free up the space.

Why some song. Always hang

Since I bought inandon karaoke got very bad experience it's upgrade almost every months after upgrade a lots of famous singer's song disappear specially in China singer, Taiwan's singer all got banned then I found out inandon is made in China Don't buy karaoke machine made in China.