As reported by @LlabTooFeR, who had previously published reliable information about pannsylvania products of HTC, One M9.
As reported by @LlabTooFeR, who had previously published reliable information about pannsylvania products of HTC, One M9 presented at the Mobile World Congress 2015, will soon get the 64-Gigabyte version.
so far, HTC has mentioned only the 32-Gigabyte version of the device. It is worth noting that all the recent flagships of the line One - One M7 and One M8 - sold as 32 GB, 64 GB of permanent storage.
@LlabTooFeR also said that One M9 with 64 GB of memory may not appear in all regions. Official confirmation of this information from HTC is not received.