Otherwise, there isn't much UNLESS the phone is already rooted and you are pretty handy with Linux. Other options are pretty limited and the adoptable-storage tag may give you some options, but in general once adoptable storage gets messed up the data is not recoverable due to the encryption used by Android. What can you? Reboot and see if it shows up again, then copy it off immediately and replace the card as soon as possible. SD cards like many types of flash storage have a finite number of write cycles, they will fail, the question is when. The way adopted storage works puts incredible amounts of stress on the card itself with constant read and write operations, even Moto staff on their official support forums recommends NOT using adopted storage if at all possible. Most 3rd Gen Moto devices are lucky to get a year or maybe 18 months and we have seen cards fail in as few as 30 days. TBH, I am surprised you got 2 years out of it. Unfortunately, using an SD card as internal (adopted) memory is very hard on the card itself. The Card has lot of important files in it. I inserted it into my PC and it wasn't getting detected. I tried various solutions like switching off and turning the device back on, cleaning the memory card, clearing cache.nothing works! This has led me to doubt that the problem might be with the SD card. It was showing 'No Internal Memory Detected'.

And when she checked her gallery, she found it empty! Out of nowhere! After further checking it was discovered that the G3 Turbo was not detecting the Samsung Evo at all, eventhough the card was still inside the device.

Today while she was using WhatsApp, suddenly she noticed that she was not being able to download any media (music, videos, songs). She has been using the phone with Evo as her internal memory since the phone was first bought. The device has 16GB of internal memory, but she is using an external Samsung Evo 32GB class 10 memory card as her INTERNAL MEMORY (Thanks to the memory-switching feature of Marshmallow). My mother has been using the Moto G3 Turbo Edition for almost 2 years now.

Recover formatted sd card in android