Polish up a little...

Marlin/Configuration_adv.h

 #define SD_FINISHED_STEPPERRELEASE true  //if sd support and the file is finished: disable steppers?
 #define SD_FINISHED_RELEASECOMMAND "M84 X Y Z E" // You might want to keep the z enabled so your bed stays in place.
 
-#define SDCARD_SORT_ALPHA // Sort in ASCII order by pre-reading the folder and making a lookup table!
+#define SDCARD_SORT_ALPHA // Sort SD file listings in ASCII order. Find additional options in cardreader.h
 #define SDCARD_RATHERRECENTFIRST  //reverse file order of sd card menu display. Its sorted practically after the file system block order.
 // if a file is deleted, it frees a block. hence, the order is not purely chronological. To still have auto0.g accessible, there is again the option to do that.
 // using:

Marlin/cardreader.h

 #ifdef SDSUPPORT
 
 #define MAX_DIR_DEPTH 10          // Maximum folder depth
-#define SORT_USES_RAM false       // Buffer while sorting, else re-read from SD
-#define SORT_USES_MORE_RAM false  // Always keep the directory in RAM
-#define SORT_LIMIT 64             // Maximum number of sorted items
-#define FOLDER_SORTING -1         // -1=above  0=none  1=below
+
+#ifdef SDCARD_SORT_ALPHA
+  #define SORT_USES_RAM false      // Buffer while sorting, else re-read from SD
+  #define SORT_USES_MORE_RAM false // Always keep the directory in RAM
+  #define SORT_LIMIT 256           // Maximum number of sorted items
+  #define FOLDER_SORTING -1        // -1=above  0=none  1=below
+#endif
 
 #include "SdFile.h"
 enum LsAction {LS_SerialPrint,LS_Count,LS_GetFilename};

Marlin/example_configurations/SCARA/Configuration_adv.h

 #define SD_FINISHED_STEPPERRELEASE true  //if sd support and the file is finished: disable steppers?
 #define SD_FINISHED_RELEASECOMMAND "M84 X Y Z E" // You might want to keep the z enabled so your bed stays in place.
 
+#define SDCARD_SORT_ALPHA // Sort SD file listings in ASCII order. Find additional options in cardreader.h
 #define SDCARD_RATHERRECENTFIRST  //reverse file order of sd card menu display. Its sorted practically after the file system block order.
 // if a file is deleted, it frees a block. hence, the order is not purely chronological. To still have auto0.g accessible, there is again the option to do that.
 // using:

Marlin/example_configurations/delta/Configuration_adv.h

 #define SD_FINISHED_STEPPERRELEASE true  //if sd support and the file is finished: disable steppers?
 #define SD_FINISHED_RELEASECOMMAND "M84 X Y Z E" // You might want to keep the z enabled so your bed stays in place.
 
+#define SDCARD_SORT_ALPHA // Sort SD file listings in ASCII order. Find additional options in cardreader.h
 #define SDCARD_RATHERRECENTFIRST  //reverse file order of sd card menu display. Its sorted practically after the filesystem block order. 
 // if a file is deleted, it frees a block. hence, the order is not purely cronological. To still have auto0.g accessible, there is again the option to do that.
 // using:

Marlin/example_configurations/makibox/Configuration_adv.h

 #define SD_FINISHED_STEPPERRELEASE true  //if sd support and the file is finished: disable steppers?
 #define SD_FINISHED_RELEASECOMMAND "M84 X Y Z E" // You might want to keep the z enabled so your bed stays in place.
 
+#define SDCARD_SORT_ALPHA // Sort SD file listings in ASCII order. Find additional options in cardreader.h
 #define SDCARD_RATHERRECENTFIRST  //reverse file order of sd card menu display. Its sorted practically after the file system block order.
 // if a file is deleted, it frees a block. hence, the order is not purely chronological. To still have auto0.g accessible, there is again the option to do that.
 // using: