I have 2 questions:

1. How to remove some records from microSD via android app? I need to delete a piece fo my records without format all in microSD!

2. I have 3 cams in my LAN, BUT on one of them the time in wrong!!! Exp: 1_cam id 192.168.0.15 2_cam ip 192.168.0.16 3_cam ip 192.168.0.17, but 1 and 2 cams time is 29/01/2021 11:32 and 3 cam time is 29/01/2021 11:08. What I have to do?