This has nothing to do with diskspace actually.
This means your harddrive is formatted as FAT32 and not NTFS. You cannot download files that are 4GB or bigger on FAT32 drives. To check if you have a FAT32 drive, go to My Computer, and right click on your main harddrive, and select "Properties". Does it say it is NTFS File System or FAT32 File System?
You must have a NTFS formatted drive to have files bigger than 4GB in size.
This means your harddrive is formatted as FAT32 and not NTFS. You cannot download files that are 4GB or bigger on FAT32 drives. To check if you have a FAT32 drive, go to My Computer, and right click on your main harddrive, and select "Properties". Does it say it is NTFS File System or FAT32 File System?
You must have a NTFS formatted drive to have files bigger than 4GB in size.