Upgrading to SSD right now help about something

[mausoc]

Hi, so I have my new SSD and I'm about to install it, but before I started the installation I wanted to make sure that my new SSD was fully functional so I connected it via external usb to sata2.5 cable.
A message saying "The disk you inserted was not readable by this computer" appeared on screen and I checked and the SSD was actually being shown in the Disk Utility and I could normally do everything you can do in Disk Utility. but my Disk was not shown on the finder window so I'm a little bit worried that my SSD won't work inside the computer.
Maybe It's the other way around and until I connect my new SSD in the hard drive internal port it will work perfectly??
Also I researched and this error message problem has happened to a lot of people too, and they say It's just an annoying warning that the computer shows by mistake.
But if I can see it in Disk Utility why can't I see it in the finder window?
Am I not gonna be able to transfer files from my old hard drive by connecting with the usb to sata cable through the finder window?
Or should I just connect my new SSD already to see what happens?
Some help would be appreciated.

 

[simonsi]

Partition it as required, then it should show up in Finder.

 

[mausoc]

Partition it as required, then it should show up in Finder.

Oh of course god, thanks for that, I did fromat the disk but I didn't check finder after doing so. haha thanks for the answer!

 

[IHelpId10t5]

You simply have a "bare" disk with no partitions. From DiskUtility simply partition it as "Mac OS Extended (Journaled)" and then it will mount in Finder and also be available during a clean install from USB.

 

[simonsi]

Oh of course god, thanks for that, I did fromat the disk but I didn't check finder after doing so. haha thanks for the answer!

Cool - did it show up ok after partitioning?