Normal (GSD) puppy behaviour. GSDs are one of those 'Velcro' dogs. I brought my pup home at 7 1/2 weeks of age. And boy did he CRRRRRRRRY and WHINE for the 1st week. Especially the first night. I was living in a studio apartment with a connected balcony to the neighbour next to me. That was where I put his crate.
The 1st night, he cried ALL night in the crate, I had to move his crate in my bathroom with the door open. He cried and cried until he was tired and fell asleep but at least the neighbout wouldn't hear him, or barely.. . The next day, after a walk and a meal, I put him in the crate in the balcony. And then I was cooking in the kitchen while listening to music with headphones, and then a couple minutes later I could hear him SCREAMING like crazy. I went out to the balcony, and... The couple who was my neighbout were at their balcony looking at my pup to see what's going on. I had to explain that I had just brought him home the night before and he was now crate training and that was why he was crying almost constantly. My neighbours were definitely worried if the dog was being abused or sthing lol.
Now, don't give up on crate training. It's one of the most necessary basic training for a dog. It took me 2-3 weeks until he dialed down on the crying. Ignore, ignore, ignore. Don't say a word when you leave him otherwise he sees it as 'Oh she's interacting, that means she's leaving, I'm gonna cry now so she doesn't leave' and you wouldn't want that! And also, train your pup to go into the crate. My command for it is 'Crate!' He goes in right away now. I've moved to a one-bedroom apartment and his crate is in the living room, and I always keep it open when I'm home. He goes in there voluntarily quite a lot, he sleeps or chills there. He definitely loves his crate now. And if you follow through with your training, your pup will too!
Funny story, my crate is size 48", not the best brand/make, he can definitely escape from it if he really wants to. When I had to leave town twice, he stayed with a sitter from Rover and my cousin. Both the sitter and my cousin told me that he broke out of the crate multiple times and complained about the crate.
Meanwhile with me, he NEVER even tried. When I leave and when I go home, he's in his crate chilling calmly, never ever jumps at me or whatever when I let him out the crate. He goes out of the crate slowly, with his head down.
When you reach that state, that's when you know you've done him well. He definitely trusts that I will come back for him no matter how many hours I leave him at home. And he's okay with that because he knows I will never ever not come back for him.
Follow through with your training! A GSD will always surprise you by how intelligent, loyal, trustworthy they are!