Hi Dima234,
Ajax uploader is designed to work with up to 2GB files. The reason for the limit is simple - current browsers does not support upload of bigger files than 2GB over internet and IIS also accepts only 2GB files.
| Software | Versions | Upload limit |
| Internet explorer | All versions | 2GB-1 |
| Mozilla Firefox | All versions | 2GB-1 |
| IIS | 1-5 | 2GB-1 |
| IIS | 6 | 4GB-1 |
| ASP | All versions | 2GB-1 |
Regards,
Ken