Hi 72Jacko,
Based on the info you provided, the quantity/size won't be a problem.
Please check the PlayMemories Home FAQs below:
http://guide.playmemoriesonline.com/help/en/pc/pmh-faq.html
http://support.d-imaging.sony.co.jp/www/disoft/int/playmemories-home/en/qa/
For further assistance, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region at http://www.sony-asia.com/locale-selector?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
Regards,
-Anthony