|If you Google for file limitations with FAT32 you will find there is a file number limitation. With a 32GB flash drive you may have reached it. Long file names and large files can significantly reduce the number. |
One solution is to use folders, which can help but NTFS would be better if you can use it. Cluster size with a 32GB partition is 32kb. Default when using NTFS is 4kb.
Is there a reason you are using FAT32, like compatibility with other operating systems?
See the link below as an example of what you can find using Google.