I captured video with my canon 550dslr and have saved the files to the computer hard drive but one file - the largest, 2.2GB - won't copy and save. I can play it on the camera, though. Any suggestions?
More information would be useful. What sort of computer and what operating system are you using?
You may be a victim of the filing system type used on your camera card. If it is formatted with the FAT file system it would explain the problem. Even a FAT32 file system - which is commonly used on some cards, can enforce a 2 GB maximum file size if the programmer is not suitably careful.
You MAY be able to download the file using another more capable computer.
The various Windows file systems set different maximum file sizes.