Now with HDD cover off, we can remove our disk.

Gently press on the disk and move it lelt - away from SATA connector, until it'll be disconnected.

Then, pull it upwards and out of HDD/SSD bay. Don't forget about that rubber element as it is a part form laptop, pull it off of old HDD and push it onto new one.

Beware! This laptop can only fit slim (7mm thick) 2,5" HDDs! Normal sized old HDDs may not fit. 2,5" SSDs regular thickness is 7mm, so they should fit.

To insert new disk, aim to insert the connectors first, then gently press it down into the bay.