|id|[long](../types/long.md) | Yes|Random file ID created by clien|
|parts|[int](../types/int.md) | Yes|Number of saved parts|
|md5\_checksum|[string](../types/string.md) | Yes|In case [md5-HASH](https://en.wikipedia.org/wiki/MD5) of the (already encrypted) file was transmitted, file content will be checked prior to use|
|key\_fingerprint|[int](../types/int.md) | Yes|32-bit fingerprint of the key used to encrypt a file|