Transfering Photos to iPhone 11 from Windows 10
I'm new to iPhone. Got an iPhone 11. I had a bunch of pictures on an old phone and PC. Searched how to do this and tried out a couple of different apps: AnyTrans for iOS and SynciOS. They seem easy enough and I got it to partially work once. But later, I tried to create a new folder on phone via app (to upload photos to) and all previous photos are deletes. Why is it so complicated. I don't want to sync files, I just want to copy them to my phone. Ideally I'd like to just drag and drop some files and put them in albums where I can see them on my phone. I hear something about iTunes, but all I see is music stuff and no way to manage files. Please help, how can I transfer photos into albums on phone w/o syncing and wiping photos. I also don't want to use email or iCloud, preferably via USB.
Thanks.
iPhone 11, iOS 13