Sandisk ssd not working on ipad os 15

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No responsible, cognizant, Apple teams or employees read NOR participate here.

These are user to user Apple product technical support communities.

We are all, largely, just Apple product customers/users, just like you!

You can leave Apple feedback about this issue at the feedback link below

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Feedback - iPad - Apple

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Use the Device Performance support category.

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Best of Luck to You!

After ANY iOS/iPadOS upgrade/update, you should ALWAYS perform a simple hard reset of your Apple mobile device.

For iPad models with a Home button, do a simple hard reset of your iPad by holding down both the Home and sleep/wake/power button simultaneously until your iPad goes to black and restarts with Apple logo, then release the buttons.

OR

For much newer design iPad models, without a Home button, try the new simple hard reset procedure for the new 2018/2020/2021 iPad Pros, 2020 iPad Air 4 and 2021 iPad Mini 6 models.

1. Press and release the volume up button.

2. Then immediately press and release the volume down button.

3. Then, press and hold the single sleep/wake/power button You will see the Slide to Power off button, but keep on holding down the power button until you see the Apple logo, then let it go.

Once you have performed all the steps, wait for a few seconds and your 2018 iPad Pro will boot up completely to the iPad Pro’s Lock screen.

Best of Luck to You!

Same here. Files app sees the drive and file content but doesn’t open files.

EXACT same issue. It was working fine on iPadOS 14, but on iPadOS 15 I see the contents but cannot open/edit/transfer the files out or in, just like the users mentioned above. Apple, please fix!