buy 8 Gigs on eBay
sell 4 Gigs on eBay
alternatively, a lot of work for limited gain but no spending:
Learn how to boot from USB
Backup personal work onto the HDD
download MS Creation tool and prepare W10 installation USB 32bit edition
overwrite the SSD with the new install, f.g.s don't partition anything there
download and install all the old software
bring back the backup files onto the SSD
avoid 3rd party (non MS-OS) sw, such as antivirus or CC cleaner
advice as per #6