As large capacity storage medium, hard drive always keeps lots of important files in individual computer and enterprise server computer. Sometimes, the value of hard drive data is far beyond the value of hard drive. It shows us that hard drive is valued, but data is priceless. However, when performing operations for hard drive data, some accidental operations may occur, such as accidental deletion, accidental formatting. If important data in server or individual video-audio collection and photos get lost due to operator's accidental operations, enterprise or individuals have to suffer important data loss caused by accidental operations. In earlier days, users have to accept such kind of result, but as technology develops and the market need increases, data recovery industry has already developed. Nowadays, many software development companies have developed their own data recovery tools. So, users can find desired data recovery tool on the internet.we should choose a piece of best data recovery software first, because the quality of data recovery software influences the data recovery success rate. However, there is too much data recovery software with different data recovery functions on the Internet. Some of them are free while the others charge for fees, and users make different evaluations on them. If you use unreliable data recovery software, you may not only fail to perform data recovery, but also make secondary damage to data, causing permanent data loss. Therefore, you should be careful when choosing data recovery software, avoiding similar data loss situation.

Then, facing so many data recovery tools whose quality is different from each other, what should we care about? Firstly, the data recovery tool we select should have good reliability. The quality of data recovery tool directly determines whether lost data can be recovered successfully or not. If we use unreliable data recovery tool, accidents may emerge. For example, scanning suspends suddenly or the tool runs unstably. This kind of data recovery tools may cause lost data to be damaged for the second time. Secondly, we should care about usability. If operating interface is so complex or so simple, the difficulty in using data recovery tool will be increased to a certain extent. The data recovery tool which has concise interface and easy operations can enhance data recovery efficiency largely. At last, function and utility are also very important. 

While, to recover data perfectly, you should pay attention to some aspects, tips as follow:

1. After data loss problems take place, we should stop writing new data into the partition, or lost data may be overwritten.

2. When restoring recovered data, we should not store them to the original partition for the same reason like the above.

3. When data are lost due to physical hardware damage, this data recovery software can not help us and we have to resort to professional data recovery companies.

Those functions and principles are suitable for diverse removable storage devices, too.