How do you find storage rentals in Europe?

Question

I need a storage rental place either in Holland or Belgium

Answer 1

Many towns have the storage, you have just to find them.
Here are some links, in the Netherlands:
http://www.kubus.nu/en/
http://www.citybox.com/
http://www.extrabox.nl/tijdelijke-opslag.html
And Belgium:
http://www.shurgard.be/index.html

Search on storage or opslag (extra opslagruimte) and the name of the town where you want to find it.