hardware

yes, the hdd is vacuum sealed so that no air or not much air would enter, or dust maybe. as soon as you have opened up your hdd, there is only a few chance that your hdd will still work, you are lucky if this is the case. you now have to copy all the data that was stored there to a different hdd so that you have a copy of everything before something mor serious would happen such as the hard disk wont be detected anymore, therefore, the data in there was lost. im not sure if you could still recover it.

There is vacuum inside the hard disk. If you open the hard disk then the vacuum escapes. It will work but the chances of data coruuption or damaging will be more because the hard is when manufactured, it is vacuumed coz no dust must enter the sectors of hard disk where data is stored.

even if there isn't any vacuum if u open th conatiner oh th HDD then it's gone,

mineslambook u r right there is vac. inside the hard disk so that no dust enters inside it