Thank you,
What you say makes me think hard,
So I switched hard disks to nvme2 since they are much faster, I copied everything from old HDD to new, thinking all wallet.dat are basically my seed, I deleted everything that contained wallet.dar with chain state from older Bitcoin core clients that weren't even installed, to speed up the process.
Now, this is the part I don't understand and never taught off, the change addresses , so basically you have to use your latest wallet.dat , or the one you used last time or part of your funds will be gone basically since Bt core generated random addresses from your original seed that contain these unique change addresses and your original address is sum of all your change addresses ?
So I made 4 transactions this year, last time I wasn't even paying attention to what btcore I use since I didn't delete it I guess, and everything showed fine since all the change addresses were contained in that recent wallet.dat?
And now that I installed newest btcore client and imported the deer I found from 2022 they don't contain my change addresses so I'm shown the Ballance without them ?
So I need to use the latest seed to have those change addresses included as mine ..
My key question is, is this process broadcaster to the chain so my main address is the owner and the value of my wallet is the one including the change ?
Because the first thing I did was to run to a Blockchain explorer and enter my BTC adresa to see if the low value of my wallet is real, and it showed the low value not the good one which is around 0.1. I know this value because I strived always to have 10% of 1 magical Btc and again I never cashed out of crypto, through all the freaking crashes and ppl laughing at me, and now this. I'm heartbrokren and frustrated not knowing what happend , I was always prepared to lose crypto even I I fully believed in it but not like this. I'm usually the guy that tells others to be paranoid about security.
What I think now of doing
Get my old laptop
Format it
Install unregistered win 10 from Microsoft
Install latest Bitcoin core wallet
Searching and finding all my wallets sorted by dates
Start importing each chronologically from new to old
Find the latest BTC core software I used and recover that wallet also.
Since you're using BTC since 2016 from what you say in the OP, there are odds that for some reasons, you were still using an old version of Bitcoin Core or of its addresses management feature at least. That is to say a non Hierarchical Determinist scheme. I'm not a Bitcoin Core specialist but maybe you've created your wallet.dat with non HD version of Bitcoin Core and because of that, you've no HD seed into your wallet.dat and Bitcoin Core is not able to calculate change addresses not included in your wallet.dat.
Or maybe it is just a single address/private key that you've imported in your wallet but you don't remember it.