When i try to see playback at 7pm and drag the line at 7pm, it line automatically skips 15-20 minutes and atarts somewhere from 7:18-7:23, so if i want to see playbavk from 7 pm then i have drag the l

Every few hours the camera shows no sd card, then have to remove and re insert several times to make it detected and then again in few hours the story repeat, it is a new sandisk 64gb sd card and fat3