It has an SSD but I don't think it's being overloaded as I don't have that much saved on the laptop.That's a decent spec so it ought not to struggle. I'm on a second gen i7 that still pulls its weight.
Is that an SSD for storage or a spinning platter hard drive? For the age it could go either way. If it's a hard drive, moving to a solid state drive is a big step change - I reached the "oh dear this is getting slow, time to build a new one" five years or so ago and couldn't believe what a bottle neck the hard drive was when I idly went solid state instead. Absolute game changer.
Tim.