Judging by the drive you currently have, it is probably an M.2 SSD. You can install up to a 4TB M.2 NVMe SSD as a replacement for the small drive you have now. However you can install a 2.5" SATA SSD up to 4TB in addition to the current SSD. You could install up to a 4TB HDD but considering how much faster a SATA SSD is that an HDD, I would not recommend an HDD. This forum post may help and offer more information.
My Dell Inspiron 5570 laptop only has storage space on C drive of 223GB.  I would like to replace the hard drive to either 1TB or 2TB.  Is this possible for this laptop and what replacement hard drive do I need to buy?
Dell Inspiron 5570