How long you use Electrum 3.0.2,are you maybe make update of old version recently and maybe download fake wallet?Only site for download Electrum wallet is
https://electrum.org/#home and if you download from any other site you will get fake version which steal your
BTC.
Do you have copy of your seed/private keys on your PC or did you share it with anyone?
If it is none of the above then you get infected by keylogger or RAT virus,it get remote access to your PC and wait to you enter password in your Electrum-then it was easy for hacker to send all coins to his address.
Is your balance now 0 or you see something?If it is 0 then I doubt that anyone can help you...
Not sure where my reply went but here again..
I downloaded Electrum from Electrum.org yesterday. My brother then send me 0.005BTC as test to make sure it works, then he send me 0.130BTC, then i send 0.011668BTC to my Binance account (i checked on binance and confirmed that the BTC are there). then all of s sutton i see another transaction that almost all (besides 0.005BTC) are leaving.
I have the seed written down on a piece of paper and didn't share it with anyone
my balance shows 0.005BTC
Could it be that they are stuck somewhere (miners) or in my wallet?
The yel;low address shows up in my ADDRESS, Change, USED section and shows value of 0......
do you need to see that code? or anything else that could help find it?