The success rate of data recovery software can vary depending on the type of data loss scenario and the quality of the software used. Generally, data recovery software has a high success rate for recovering accidentally deleted files, formatted drives, and files lost due to minor file system errors. However, the success rate may be lower for more severe data loss scenarios, such as physical damage to the storage media or severe corruption of the file system. In these cases, it may be necessary to seek professional data recovery services. It's also worth noting that the success rate of data recovery software can vary between different software vendors and their specific software offerings. It's important to do research and choose a reputable software vendor with a proven track record of success.