** Backblaze BLZE.O shares rise 18.2% to $9.60 premarket

** The cloud storage firm signs a five-year, $335 mln agreement with neocloud firm CoreWeave CRWV.O

** BLZE will provide storage capacity that supports parts of CRWV's managed storage infrastructure

** CRWV customers gain access to new service tiers without any code modifications

** Up to last close, BLZE has risen 74.3% so far this year