Microsoft's Surface Pro, powered by the full Windows 8 version, is coming out with an advertised storage capacity of 128GB and 64GB. But a new report has indicated that only a fraction of that memory will be available for users to enjoy.

The new Microsoft hardwares, according to The Verge, will reach consumers with little to spare on internal space, with Windows 8 and other native applications gobbling up to 50 per cent of the total memory installed during the tablets' manufacturing phase.

For instance, the 64GB model of the Surface Pro is left with only 23GB, giving up too much space for the Microsoft operating system, which proved, according to BGR News, that the platform is packed with too heavy of a size.

To prove its point, iOS 6 on the new iPad 128GB reserves at least 85GB for buyers' use right out of the box, BGR added.

That is 2GB more from the Surface Pro 128GB model, which Microsoft said "has 83 GB of free storage out of the box." The hefty Windows 8 automatically eats up more than 40GB off the device, suggesting that Microsoft will not release budget versions of its Surface tablet lines anytime soon.

Consider the Windows RT 32GB variation, which when launched last year was left with a measly 16GB of usable memory. The rest was automatically allocated to Windows RT, purportedly a trimmed-down version of Windows 8 but still requires half of the tablet's storage capacity to function normally.

Compared to a 16GB Android tablet, which reserves a maximum of only 3GB space for Android, Windows 8 is way too hungry for disk room.

This analogy rules out the possibility that Microsoft will offer the Surface RT in 16GB configuration, making it difficult for the tech giant to further pull down the price tag that comes with its 'cheaper' tablet.

However, for those still mulling a Surface Pro buy once it officially rolls out, there is a way to recover some storage space, according to The Verge.

Per Microsoft's advice, users can actually delete the Surface tablet's recovery partition but not before "creating a backup bootable USB."

Or users simply can buy a compatible memory card for the Surface's microSDXC expansion slot, which Microsoft said will accept up to 64GB of additional space.

Experts, however, fear that consumers will likely be turned off by the spectre of spending so much on the Windows tablet and instead opt for Apple or Android devices.