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The Welland ME-601J connects 2.5" and 3.5" disks via a USB docking station that is ideal for frequent connections. You would use the Welland ME-601J if you peform a lot of computer installations and want to preload a prebuilt operating system to hundreds of disks. You could also use it for mass pirating of software but you probably use free open source software which means it is not pirating.

The Welland ME-940J connects one 2.5" disk via USB or eSATA. The main advantages are small size, low cost and no fan.

There are times when you just want to store some files away from your computer just in case something happens. Way back in the previous century you would use an FTP server for the storage. Today you use NAS, Network Attached Storage. Tomorrow you might store the files in a Cloud.

The Welland ME-747J connects one disk via USB or eSATA. The main advantages are low cost and no fan.

A long long time ago in a technology far away someone created hard disks with a block size of 512 bytes. The file systems using the disks grew to use block sizes of 1KB (1 kilobyte or 1024 bytes) then 4KB (4096 bytes) and larger. The disks never grew up to match the file systems. Demand improve disks now!

How do you carry data from one page to another using sessions?

You can use standard PHP features to access and use session data. In your Drupal Web site, you can add code direct to a Web page or write an add on module to process data on any page. The same code works in any page in every Web site except a few that do not have PHP switched on by default.

There are lots of Web pages comparing Linux to Windows and recommending you use Linux. They recommend a specific distribution of Linux, usually Ubuntu. Now read the comments. Every second comment says Yes, use Linux but not that distribution! You then get a sales pitch for a Linux distribution no one has ever heard of. Why do people recommend these weird Linux distributions for first time Linux users?