Formatting a Micro SD card

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Joined: Thu May 07, 2020 6:32 am

Formatting a Micro SD card

Post by danelizer » Sat May 09, 2020 4:27 am

I’ve tried formatting three different Micro SD cards and no luck on any of them. It starts off a 20% then hangs for a couple minutes and then says done. However, its not usable. I try it again and it starts off at 40% completed and then fails. It says “ Attempt to invoke virtual method ‘java.lang. String android.OS. Storage. VolumeInfo.getld() on a null object reference.” Any clue to get me going in the right direction?

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Joined: Fri Feb 03, 2017 11:59 am

Formatting a Micro SD card

Post by InSaNeAuDiOSupport5 » Sat May 09, 2020 4:31 pm

Hey folks!

We've received quite a few emails and notes about formatting the microSD card or a USB thumb drive. So we created this forum posts for everyone out there trying to get this sorted.

Let's get on with it.

Always remember, the media (the microSD card or a USB thumb drive) needs to formatted as either FAT32 (for cards up to 32GB) or NTFS (for anything over that) and cannot be formatted as exFAT.

Please ensure that you are trying to format the microSD card and USB thumb drive using your PC. Here are a few steps with which you can check the format of the card.

Open Windows Explorer
Find the drive letter for your SD card
Right click on it for a menu and click on Properties
It should say NTFS as the file system. Otherwise, the same menu has a Format option, and you can erase the whole card with a NTFS file system.

Else, if you are using MacOS:

Connect your SD card to your Mac using a card reader.
Open Disk Utility app.
Select your SD card.
Choose filesystem format as NTFS

Formatting the media is a very simple process, but can be a pain if not done right. So here's what you've got to know:

You need to format the card on a PC and not on the Head Unit itself and it cannot be formatted as exFAT. When you go to format it, it will default as exFAT and you need to explicitly change that and format it as FAT32 or NTFS accordingly.

If you're receiving a "Damaged Storage" error message and if you are receiving that message on the top status bar, then it means that you either have a bad media or it is improperly formatted. You know your card is good if you can insert it and access it with the file browser app.

You also need to make sure you are using a legitimate (i.e. brand name) microSD card that is Class 10 or better. There are quite a few counterfeit cards out there and you can even find them on

We're sure that once you get this right, you can enjoy terabytes worth of music, movies at the tap of a finger right on your Unit.

Posts: 3
Joined: Thu May 07, 2020 6:32 am

Re: Formatting a Micro SD card

Post by danelizer » Sat May 09, 2020 6:00 pm

That worked! Thanks for the good instructions.

Posts: 409
Joined: Mon Sep 01, 2014 1:09 pm

Re: Formatting a Micro SD card

Post by InsaneAudioSupport » Tue May 12, 2020 11:22 am

Another pro tip - if you have a huge movie collection, check out the VLC app on the Google Play Store. VLC is an open source project and is entirely free. Its by far the best video player out there and supports just about every known file format. Did we mention its FREE?

If you've got a huge music collection, you may also want to experiment with custom music players and there are a lot out there! Try Pulsar, Google Play Music, or check out the cool writeup our team did a while back reviewing some of our favorites -

InSaNe AuDio Support Staff

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