How can I increase my laptop’s storage space?

Marex has run out of space for music and graphic design work;
thankfully, adding an SSD is easy

I use a Dell 15-5577 laptop with 8GB of memory for music
production and graphic design. The problem is that its 256GB SSD is
not enough to store all my projects. An external drive is not an
option because I want everything in the same “drawer” and
it’s a pain to carry it everywhere with me. I need help with how
to swap out my existing SSD with a larger capacity one, say 512GB.
While I’m at it, should I also upgrade memory?
Marex

The Dell Inspiron 15-5577 was sold as an affordable 15.6in
gaming laptop with an Intel Core i5 or i7 Kaby Lake (7th
generation) processor and an
Nvidia GTX 1050 graphics chip
. It costs from £799 to £1,299
depending on the processor, graphics, storage and type of screen
installed. It also has an Ethernet port, three USB 3.0 ports and a
full-size SD card slot.

Source: FS – All Tech News 2
How can I increase my laptop’s storage space?