Recovering Data From A Corrupt Zip File After Improper Download Over The Internet

The file compression tools are extensively used for data storage and data transfer

. These tools compact the files in a simple and easy-to-transfer mode, usually in a ZIP format. Apart from bundling the files in a single compressed file, these ZIP files also ensure security from the viruses and ease of transfer over the Internet. However, sometimes the ZIP files do get corrupt thereby making you unable to extract data. It could happen due to various reasons such as CRC errors, virus infections, power surges, etc. In such cases, you should use a third-party ZIP repair to perform ZIP repair.

Consider a scenario wherein you have downloaded the entrance form of a competition exam as the website is blocked at your workplace. You move the soft copy of the form, which is in the ZIP format, to your pen drive. When you try to extract the ZIP file, it fails to do so. An error message is displayed, that is:

Cannot open file: it does not appear to be a valid archive.

After getting this error message, you are unable to extract the ZIP file.

Cause:

The root cause of this error message is that there were interruptions in the network connectivity when you were downloading the ZIP file. Sometimes, line overload can cause noise in the data exchange that causes errors in the transfer.

Such errors are called CRC (Cyclic Redundancy Check) errors in which the data part remains intact but you are unable to extract it.

Resolution:

To resolve this issue, you should download the ZIP file, if possible, from its source location. However, at times you may not be able to download the ZIP file, as can be seen in this case. In such situations, you should use a third-party ZIP repair software to repair ZIP file. Such read-only tools are capable of recovering all the data from the corrupted ZIP files by using fast yet sophisticated scanning algorithms.

by: suzismith

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