There are some reasons why individual or company want to change to a new web host company. It could be as simple as not enough storage space or bandwidth. It could be due to its client service or lack thereof.
To Keep your web host account with your existing host open. It is recommend that you keep your existing web host account active until you have completed the transition steps such as new account setup, file transfer, email creation and setup, DNS modification and propagation. This will ensure that your website and domain email account will be running during the transition.
Choose a suitable new web hosting provider:
a) Type of Operating system- It depends on the technology of your website require. For example, if your website requires ASP, MSSQL, MSACCESS or other Microsoft-specific technology. That you must need to find a Windows-platform web host plan.
b) Bandwidth and disk space requirements:
To Make a backup copy of your existing website: You should download old account files, Ideally, files should be downloaded in the same tree structure in which you want to upload it later. Sometimes, some free web host provider do not offer FTP access. If this is the case, you will not be able to download your existing web files and will have to re-create your new web files. You should check to see if your new web hosting provider offers a free website creator. Hence to avoid running into the same problem in the future that make sure your new web hosting provider offers FTP access.
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Setup new email addresses:
To ensure that email are properly received that is important to keep the same email addresses which including email aliases and forwarder.
DNS changes and propagation:
Once you have uploaded your web file or folder to the new web host server and re-created your email accounts. Then you can go ahead and make the necessary domain name server change.
DNS is usually obtained once you have signed up with the new web host service. You will need to replace your existing DNS setting with the new one this is usually done via your domain management panel.
The new DNS will take anywhere between 24-48 hours to propagate therefore the old web host is responsible for site and email in the meantime.
But some times while uploading files or folder on your server, you must be alert because your files can be corrupt due to any reason. Your files and folder can be corrupt if your system has been affected by any virus, while clicking on any unknown sites and many more. If you are technical expert then you must remove it by manual method. Otherwise you can use tools.