Do you have backups in the backup folder? if so copy them to a PC and delete them from the SD card and do a new backup and also copy that to PC. Then install a fresh copy and restore from backup. If you don’t have backups filling your SD card, use Win32diskimager or similar to create a disk image then flash that to the new card. Although I would not be using an SD card I would invest a bit more and get an SSD.