I have encountered a similar problem about iPhone backup before.
1.Copy all pictures from your current NTFS formatted drive C:\Documents\Pictures to F:\Pictures (or to a directory of your choice)
2.Open iTunes and select the new folder that you want to use to sync photos to your iPhone – F:\Pictures
3.Sync your iPhone and everything should work smoothly.
And i share you a column about
iPhone Transfer. This has worked perfectly for me everytime I've tried it.
Hope it can do you a favor.