Some USBs don't appear in Finder. They appear in Disk Utilities so how do I get them to appear in Finder?

Question

Some flash drives/USBs don't appear in Finder. But they appear in Disk Utilities so how do I get them to appear in Finder?

Answer 1

If you've never used them before (they are new) then they are not formatted for Macs.
Drive Partition and Format
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Apply button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
When you want to remove an external device you must Eject it:
First, select the Desktop icon of the external disk. CTRL- or RIGHT-click and select Eject from the context menu.