Yes -- just replace the existing SSD with a larger capacity drive.  
Hello, I have a Dell Inspiron 15 5577 gaming laptop with 1 TB HDD and 128 GB SSD (TOSHIBA THNSK128GVN8 M.2 2280) pre installed. Recently my SSD got corrupted and I want to add an SSD but I want to know if this laptop supports NVME M.2 2280 V-NAND SSD of 500 GB. I also want to know if I can use 500 GB SSD with 1 TB HDD simultaneously together. I want to know if this laptop supports Gen 4 PCIe slot for SSDs. Which one should I buy from the following Samsung 980 Pro (Gen 4) Samsung 970 EVO Plus (Gen 3) Crucial P5 Plus 500GB PCIe M.2 2280SS SSD Crucial P2 500GB PCIe M.2 2280 SSD You can suggest any other.   Thanks and regards.
DELL INSPIRON 15 5577 SSD Upgrade