Document files and JPG files larger on sharepoint than they ought to be

Question

Documents that I've uploaded to sharepoint (documents meaning anything that is file.doc / file.docx) seem to be nearly twice as large as they should be in most cases. I'm pretty sure that uploading the document to sharepoint mysteriously adds something along
the lines of 10-15KB on top of what is already there (For smaller, one page documents).
The same problem occurs to a lesser extent with jpg/jpeg files, where the image is marginally larger than it would be on a local hard drive. A 5kb image, for example, might be more like 5.3kb on sharepoint. Normally I would expect some form of compression
to occur, and I would expect to see the filesize shrink a bit. I can't imaging what is causing the filesize to go up this way.
I'm assuming there is some kind of strange versioning or underlying data being added behind the scenes, but I was curious as to why the file sizes are much larger on sharepoint than on a local hard drive.
For reference, I am simply uploading the file programatically by sending the byte array to the file itself. I'm not doing anything complicated, really. Nothing I would expect to cause the file to be larger, at least.
It may also be worth mentioning that I re-downloaded the file and compared it with the original, and other than the random size difference, they are 100% identical.

Answer 1

Zachary,
SharePoint 2013 now leverage SqlServer Shredded Storage technology. As you guess it right, going forward SharePoint will shred its content in multiple pieces to only add delta for next version. Great feature for saving storage.
Lets assume a file is 5 MB. In previous SharePoint (SP) version, all subsequent version of that file will be saved differently. If first version add one extra MB to that file, Then total storage would have been as (5MB + 6MB) in SP 2010, but in SP 2013,
the moment we upload / checkout a file, SP will automatically Shred that 5MB file in 10 Shred(Hypothetically 500KB each). I am certain that while Shredding, it has some basic Shred block size (which can be configured) which multiply by number of shred. And
that might be the reason file size is increase.
When we migrate or upload programmatically, Shred logic dont apply, but the moment you check out - SP will Shred it(As per my knowledge). Please test it.
A good resource : The Truth Behind Shredded Storage By: Jeremy T.
SharePoint 2013 shredded storage with traditional and RBS storage
Good to have some insider validation on this topic!
please 'Propose as answer' if it help you, also vote this as helpful if you like this reply.