Is this laptop upgradable= Dell Vostro 15 3559 3559541TBiBU Core i5-6200U/4GB/1TB/Ubuntu/Integrated Graphics), Black ?

Hi NEEDS PARTNER,

Kindly find the specifications for your system model here - http://dell.to/2fsp1zY

To enhance the speed of the system, you would need to upgrade to a SSD from standard HDD.

You could find the compatible memory and SSD here for the system - http://bit.ly/2epvlap

Also, please click my DELL-username and write me a private conversation with the service tag and your Name for case records.

Let us know if you have any other queries.

Not upgradeable:  The CPU and GPU.

Upgradeable:  hard drive (replace with SSD), Memory (2X 8 = 16 G max).

Replacing the hard drive with an SSD is about the only way you'll speed up this system.