Any storage device that can be connected via an adaptor to an iPhone or iPad can be used with this app. In general, if you can see the contents of your storage device in the Files app, then this app can show the videos as well.
Yes, you can purchase pre-formatted iXapnd that are ready to be plugged in to your car from here: https://puretesla.com/stats
Here are some useful links (not related to the SentryView app):
Download RMPrepUSB and make sure to check the option "Make Partition non-bootable":
Make surethe settings are as follows.
During formatting, you must set the "scheme" to "Master Boot Record" (iOS requirement). See step 4 below
Tesla requires USB drives to be formatted as FAT32.
On Windows: Follow these instructions
On Mac: Follow these instructions
You can also google "how to format FAT32" and find a lot of related answers.
Please also watch this useful video about how to set up the USB device using a Mac.
Tesla requires USB drives to be formatted as FAT32 (this i not specific to SentryView).
If you are somewhat familiar with computers, it's very easy to do. Please see the Q&As here for formatting tips/instructions.
You can also purchase pre-formatted USB drives compatible with SentryView app from PureTesla.com
Important: After formatting the device, you need to create a TeslaCam folder on the USB drive. The folder name must be TeslaCam and it is case-sensitive, so it cannot be Teslacam or any other variations.