Recently bought a Mavic Pro Platinum Combo. Bag provided is too small for anything but the aircraft and RC (and maybe one spare battery).
I have found the Lowepro Format Backpack 150 for under £40, which will accommodate the whole combo kit, including 2 spare batteries, mains and car chargers, spare blades and my Samsung Note handheld. Just for info, for anyone with similar storage problem.

Same problem with the flymore combo bag , i bought the Lowepro Tahoe BP 150, ( about 55 euros here..) and it is perfect to carry Mavic Pro and many accessories, like batteries etc.
I often use also the flymore combo bag to carry only the drone with the radio control (with the PGYTECH control stick protector mounted .. ), while in the backpack I put SLR cameras, telephoto lenses, and Mavic accessories.