Re: Urgent !! Add a Memroy ! Need help. Thank you so much !
1) This means there is one upgradable memory slot.
2) Assuming your laptop currently only has 4GB of memory, you can add either a 4GB or 8GB module to the upgradable slot which will give you a total amount of 8GB or 12GB respectively (since you have 4GB from the factory that cannot be upgraded or removed).
3) You should be able to install either a 4GB or an 8GB module without any issues.