The suspicious disk access does not always have to be from the virus. Usually its the defragmentation tool defrag.exe from Microsoft The disk is defragmented
However, formatting does not completely erase the data. It can be recovered with a variety of software, whether it is a quick format or a normal format.
Suitable for this is the free tool, or the small Linux operating system, which can start from USB or CD Linux emergency CD. It has not only a partitioner,
The exFAT is a file system , like FAT16, FAT32, or NTFS. The "Extended File Allocation Table" exFAT for short was developed specifically for flash storage,