Update README.md

Author: siara-cc

README.md

@@ -16,7 +16,7 @@ apart from `SPI.begin()` or `SPIFFS.begin()` as appropriate.
 
 The SS Pin is D8 on the Micro SD Shield for WeMos D1 mini.  It can be changed accordingly.
 
-Please see the examples for full illustration of usage for the two file systems.
+Please see the examples for full illustration of usage for the two file systems. The database need to be copied to the Micro SD card root folder before the SD example can be used.
 
 ## Dependencies
 The SdFat library is required for accessing MicroSD card.  This library can be donwloaded from https://github.com/greiman/SdFat.
@@ -35,7 +35,7 @@ Under Arduino15 folder please navigate to `packages/esp8266/hardware/esp8266/<ve
 If you do not have the ESP8266 sdk for Arduino, please see http://esp8266.github.io/Arduino/versions/2.0.0/doc/installing.html for installing it.
 
 ## Limitations on ESP8266
-* The default page size of 4096 leads to "Out of memory" as the size increases over 500 records. Please use page size of 512 using the commands "PRAGMA page_size=512; VACUUM;", if you are planning to use your own sqlite3 files.
+* The default page size of 4096 leads to "Out of memory" as the size increases over 500 records. Please use page size of 512 using the commands `PRAGMA page_size=512; VACUUM;`, if you are planning to use your own sqlite3 files.
 * Inserting records over a 1000 records gives "Out of memory"
 * These problems exist on NodeMCU as well due to low memory on ESP8266
 * Retrieving from db having 10 million records has been tested. But it needs stack space to be increased to atleast 6144 bytes.  Please modify cores/esp8266/cont.h to increase stack size.
@@ -44,4 +44,5 @@ If you do not have the ESP8266 sdk for Arduino, please see http://esp8266.github
 * This library was developed by modifying the VFS layer developed by [Luiz Felipe Silva](https://github.com/luizfeliperj)
 * The census2000 and baby names databases were taken from here: http://2016.padjo.org/tutorials/sqlite-data-starterpacks/. But no license information is available.
 * The mdr512.db (Million Domain Rank database) was created with data from https://majestic.com/reports/majestic-million and is provided under CC 3.0 Attribution license.
-* (Of course) The Arduino platform (https://arduino.cc)
+* The (ESP8266 core for Arduino](https://github.com/esp8266/Arduino)
+* [The Arduino platform](https://arduino.cc)