When I drive my suzuki xl7 at 4x4 (4H) there is grinding sound

Do yourself a favour and for your own safety, take it to a Suzuki garage for repair.
Brakes that don't work properly are very dangerous.

A grinding noise when you put the motorcycle into gear and it doesn't move could indicate several issues with the final drive on your Suzuki Intruder. Some possible causes are:

1. Worn or damaged clutch: The clutch may not be engaging properly, preventing power from reaching the rear wheel. A worn or damaged clutch can cause a grinding noise when you try to shift into gear.
2. Faulty gear: The gears inside the final drive may be worn or damaged, preventing them from meshing together properly. This can cause a grinding noise when you try to shift into gear.
3. Low or contaminated gear oil: Low or contaminated gear oil can cause excessive wear on the gears inside the final drive, leading to a grinding noise and reduced performance.
4. Failed final drive: A failed final drive can cause a grinding noise and prevent power from reaching the rear wheel.

If you are not familiar with motorcycle repair, it is recommended to take the bike to a qualified mechanic to diagnose and fix the issue.

Starter clicking, not enough power to turn motor over. Check the battery, make sure charge is full. If it is, your starter is shot, replace it

you need check your brake hoses

sound like brake pads worn down to metal damaging the brake rotor causing grinding noise.

the throw out bearing has not been properly installed on the fork

Sounds like a wheel bearing. Jack up front end and spin wheels by hand and listen for grind. Same for rear wheels. Make sure brake linings are good all around. Do the swerve test. Drive down road bout 40mph and swerve moderately one side to other. If noise gets louder with weight shifted to one side more than other its most likely a wheel bearing.

maybe shifter adjustment, bad reverse signazors in trans.

check your CV joints on your front drive axles. they will sometimes grind or click when braking or turning.

most probable cause is the wheel bearing which is part of the axel hub Thanks Ray