Welcome to the Dell Community @Marz77
Yes it is possible.
Crucial MX500 1TB SATA 2.5" 7mm (with 9.5mm adapter) Internal SSD:
Crucial MX500 2TB SATA 2.5" 7mm (with 9.5mm adapter) Internal SSD:
These parts are 100% compatible with Inspiron 15 (3576)
4TB ssd is possible.
F6 mass storage drivers are required to "see" the drive.
Yes 4TB SSD's have been available for sometime now.
If you want to spend $600 - $1000+
This one is $200 less than the one on Amazon.
Shop around before you purchase.
Prices for 7mm drives are very reasonable now.
I still tend to recommend the SAMSUNG versions however.
OCZ’s SSD DRIVES ARE never recommended. Toshiba purchased them when they went bankrupt. So I would be leary of getting anything from them.
Next Best is
If you look at the specification for the "Storage" it says:
|Solid-state drive||Up to 256 GB|
Inspiron 15 3000 Setup and Specifications:
That is what Dell sold and test for your model.
That is what they can only recommend.
Inspiron 15-3576 Service Manual:
256 GIG is NOT the Limit its the max they offer for sale.
Replacing the drive is not trivial and you must be CAREFUL with the flex cables and connectors.