We usually exchange large files with our customers, such as highly compressed virtual machines. Compression works perfectly for us, as it allows us to send a VM as one file, which is usually a self-extracting archive. However, downloading files opens up the possibility of download corruption, which can render the compressed archive useless.
In order to avoid corrupted downloads, you should use a download manager that allows you to resume the download in case it breaks. We’ve had good luck recently with Internet Download Manager.
In order to verify that no corruption has happened during the transfer process, we usually send our clients a sfv file. This file is intented to be used with QuickSFV in order to verify that the download is not corrupt . The following guide will instruct you on how to use QuickSFV to verify that your download is not corrupt.
We are assuming that you:
- Already have the files downloaded somewhere on your computer
- Already have installed QuicSFV on the computer where the files were download (make sure you install the correct one if you are using a 64-bit OS)
- Have placed the sfv in the same folder where the files you want to check are located
- Navigate to the folder where your downloaded files are
- Double click the sfv file
- QuickSFV will start checking your files. Depending on the size of the files, this might take some time
- If you see a dialog similar to the one below that displays All files OK, you are good, the files have been verified:
- If you see the dialog below, pay attention to which file is corrupt and re-download the file:
ALWAYS use a download manager for large files, you’ll be sorry if you stick to FireFox/Internet Explorer for these types of downloads.
Consider donating to QuickSFV, it’s a great utility that can save you hours of pain.