QNAP HM +250MB collaborator upload limit to Business Plus shared folder

Hi every one. I'm new to box and i'have a "Unsupported file sizes" with a "Failed to upload" problem with +250MB file (work fine with less than that) on my QNAP Hybrid Mount app. I've signed in with my free account but the Share Folder where I upload the file is a Business Pro folder and I'm an Editor of that folder. Anyone with the same problem or a way to fix this? Tnks in advance