There are following possible reasons that may lead a digital camera to pop up message showing CF card has unsupported file system and disable you to access files stored on the card:
What mentioned above are common causes that can result in CF card unsupported file system. Sometimes, PC may say CF card has unknown file system or RAW file system. It does not matter why your camera says CF card has unsupported file system, it is possible to do inaccessible CF card recovery.
Video - Fix memory card unsupported file system
A useful way is to use iCare Data Recovery Pro to extract all files from the inaccessible CF card when it turns to RAW format. iCare Data Recovery is able to recover pictures, videos, documents, music, etc off different CF card like SanDisk, Toshiba, Transcend, Samsung, Kingston, etc. It recovers files when CF card has RAW file system, unsupported file system or unknown file system. Now, download the compact flash card recovery software and follow the steps below to recover files from CF card:
Step1. Select Scan Mode
You can select "Deep Scan Recovery" mode to restore files from CF card when your digital camera reports the card has unsupported file system.
Step2. Select CF card to scan
You need to select the CF card as target disk so that the software will scan it to search lost data. You only need to wait patiently when the software is scanning.
Step3. Preview files and select the files to recover
When software show all found files after scanning, you can preview photos and Microsoft files. Then, you can select all lost files and save them to another storage media.
If you still have another camera, you had better insert the CF card to another camera you’re your camera shows error that CF card has unsupported file system. Sometimes, you may receive the warning message because CF card is not compatible with your camera. If you are sure that there is something wrong with your CF card which lead it to be inaccessible, you can use iCare Data Recovery to perform file recovery from memory card.