You can make a ticket and we will get back to you as soon as possible about the pricing for any of the parts you would like to change (such as adding more memory, removing some memory, adding disks, etc.)
This can come with a 10 EUR one-time fee (unless you prepaid for 6 months upfront, then it is free-of-charge). These are handled when the customer and the technician agree on a downtime window. May not be on the same day.