Your best bet would be to format the card on a regular computer, Mac/Windows/Linux where they give you choices. On Windows, from file explorer, you can generally right-click on the SD drive icon and select "Properties" from the pop up menu and it should tell you what format it is. If it can't read it at all, then you'll need to format it. That should be another option on the menu.
Thanks.
Although my PC no longer seems to be able to read SD cards via the SD card slot, it can do so when they’re inserted within a portable device, such as the tablet, smartphone, or mp3 player. In other words, via the standard USB ports. However, when I right click on the “Card” icon for the particular portable device in My Computer, no options for formating appear. It seems the card can only be fully ulilized when inserted into the SD slot. I thought about purchasing a USB-based SD card reader/adapter. But since the card apparently is not fully accessible via a USB connection, it probably yield the same failed results as the USB portable devices.