File extension CSO
| File type | CISO Compressed ISO Format |
| Developer | N/A |
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What is a CSO file?
The CSO file extension is used to store compressed disk images in ISO format. They are mainly used by PSP - Sony's portable game console. CSO files can be created using one of nine compression levels. Depending on the height of the level, we get more compression, but also a longer loading time.
CSOs are files created with tools called PSP ISO Compressor, Prometeus, and YACC (Yet Another CSO Compressor). Games packed in CSO files are placed on UMD cards. They can be handled by the PSP provided that the user has the software to support this format.
Program(s) that can open the .CSO file
Mac OS
How to open CSO files
If you cannot open the CSO file on your computer - there may be several reasons. The first and most important reason (the most common) is the lack of a suitable software that supports CSO among those that are installed on your device.
A very simple way to solve this problem is to find and download the appropriate application. The first part of the task has already been done – the software supporting the CSO file can be found in the table. Now just download and install the appropriate application.
Possible problems with the CSO format files
The inability to open and operate the CSO file does not necessarily mean that you do not have an appropriate software installed on your computer. There may be other problems that also block our ability to operate the CISO Compressed ISO Format file. Below is a list of possible problems.
- Corruption of a CSO file which is being opened
- Incorrect links to the CSO file in registry entries.
- Accidental deletion of the description of the CSO from the Windows registry
- Incomplete installation of an application that supports the CSO format
- The CSO file which is being opened is infected with an undesirable malware.
- The computer does not have enough hardware resources to cope with the opening of the CSO file.
- Drivers of equipment used by the computer to open a CSO file are out of date.
If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the CSO file should operate with your programs without any problem. If the problem with the CSO file has not been solved, it may be due to the fact that in this case there is also another rare problem with the CSO file. In this case, the only you can do is to ask for assistance of a professional staff.
Updated 04/29/2022
Similar extensions
| .adz | Amiga Emulator Compressed ADF Format |
| .aff | Advanced Forensics Format Disk Image |
| .ashdisc | Ashampoo Disk Image Format |
| .atr | Atari 8-bit Disk Image |
| .avhd | Microsoft Hyper-V Differencing Disk Format |
| .b5i | BlindWrite Image Format |
| .b5t | BlindWrite Image Format |
| .b6i | BlindWrite Image Format |
This extension
can be converted to:
How to associate the file with an installed software?
If you want to associate a file with a new program (e.g. my-file.CSO) you have two ways to do it. The first and the easiest one is to right-click on the selected CSO file. From the drop-down menu select "Choose default program", then click "Browse" and find the desired program. The whole operation must be confirmed by clicking OK. The second and more difficult to do is associate the CSO file extension to the corresponding software in the Windows Registry.
Is there one way to open unknown files?
Many files contain only simple text data. It is possible that while opening unknown files (e.g. CSO) with a simple text editor like Windows Notepad will allow us to see some of the data encoded in the file. This method allows you to preview the contents of many files, but probably not in such a structure as a program dedicated to support them.