@Twiggy2021 Hi trhere, 

If your camera detect motions too frequently, you could try lower the Motion sensitivity as Step7 mentioned in this FAQ

https://www.tp-link.com/support/faq/2622/

Yes, you and your family can share the same Tp-link account by using same email address to login Tapo app and cameras will show up on different phones.

The Tapo camera supports micro-SD cards with up to 128GB capacity, which should be formatted to the FAT32 file system.

For night mode, please send us a photo and help explain in details.

Here is a comprehensive FAQ for tapo cameras that you might be interested.

https://www.tp-link.com/support/faq/2742/