gdal_translate -f "HFA" "SENTINEL2_L1C:/vsizip/D:\APSAC\Change Detection\data\S2A_MSIL1C_20151228T050222_N0201_R119_T44QMD_20151228T051117.zip/S2A_MSIL1C_20151228T050222_N0201_R119_T44QMD_20151228T051117.SAFE/MTD_MSIL1C.xml:10m:EPSG_32644" "D:\APSAC\Change Detection\data\RGB\S2A_MSIL1C_20151228T050222_N0201_R119_T44QMD_20151228T051117_10m_b8_b4_b3_b2.img" -stats -a_nodata 0

gdal_translate -f "HFA" "SENTINEL2_L1C:/vsizip/D:\APSAC\Change Detection\data\S2A_MSIL1C_20160110T051202_N0201_R019_T44QMD_20160110T052202.zip/S2A_MSIL1C_20160110T051202_N0201_R019_T44QMD_20160110T052202.SAFE/MTD_MSIL1C.xml:10m:EPSG_32644" "D:\APSAC\Change Detection\data\RGB\S2A_MSIL1C_20160110T051202_N0201_R019_T44QMD_20160110T052202_10m_b8_b4_b3_b2.img" -stats -a_nodata 0

gdal_translate -f "HFA" "SENTINEL2_L1C:/vsizip/D:\APSAC\Change Detection\data\S2A_MSIL1C_20170203T051011_N0204_R019_T44QMD_20170203T051647.zip/S2A_MSIL1C_20170203T051011_N0204_R019_T44QMD_20170203T051647.SAFE/MTD_MSIL1C.xml:10m:EPSG_32644" "D:\APSAC\Change Detection\data\RGB\S2A_MSIL1C_20170203T051011_N0204_R019_T44QMD_20170203T051647_10m_b8_b4_b3_b2.img" -stats -a_nodata 0

gdal_translate -f "HFA" "SENTINEL2_L1C:/vsizip/D:\APSAC\Change Detection\data\S2A_MSIL1C_20170210T045931_N0204_R119_T44QMD_20170210T050445.zip/S2A_MSIL1C_20170210T045931_N0204_R119_T44QMD_20170210T050445.SAFE/MTD_MSIL1C.xml:10m:EPSG_32644" "D:\APSAC\Change Detection\data\RGB\S2A_MSIL1C_20170210T045931_N0204_R119_T44QMD_20170210T050445_10m_b8_b4_b3_b2.img" -stats -a_nodata 0

gdal_translate -f "HFA" "SENTINEL2_L1C:/vsizip/D:\APSAC\Change Detection\data\S2A_MSIL1C_20180225T045751_N0206_R119_T44QMD_20180225T102148.zip/S2A_MSIL1C_20180225T045751_N0206_R119_T44QMD_20180225T102148.SAFE/MTD_MSIL1C.xml:10m:EPSG_32644" "D:\APSAC\Change Detection\data\RGB\S2A_MSIL1C_20180225T045751_N0206_R119_T44QMD_20180225T102148_10m_b8_b4_b3_b2.img" -stats -a_nodata 0

gdal_translate -f "HFA" "SENTINEL2_L1C:/vsizip/D:\APSAC\Change Detection\data\S2A_MSIL1C_20180228T050741_N0206_R019_T44QMD_20180228T103443.zip/S2A_MSIL1C_20180228T050741_N0206_R019_T44QMD_20180228T103443.SAFE/MTD_MSIL1C.xml:10m:EPSG_32644" "D:\APSAC\Change Detection\data\RGB\S2A_MSIL1C_20180228T050741_N0206_R019_T44QMD_20180228T103443_10m_b8_b4_b3_b2.img" -stats -a_nodata 0

gdal_translate -f "HFA" "SENTINEL2_L2A:/vsizip/D:\APSAC\Change Detection\data\S2A_MSIL2A_20190210T045941_N0211_R119_T44QMD_20190210T090457.zip/S2A_MSIL2A_20190210T045941_N0211_R119_T44QMD_20190210T090457.SAFE/MTD_MSIL2A.xml:10m:EPSG_32644" "D:\APSAC\Change Detection\data\RGB\S2A_MSIL2A_20190210T045941_N0211_R119_T44QMD_20190210T090457_10m_b8_b4_b3_b2.img" -stats -a_nodata 0

gdal_translate -f "HFA" "SENTINEL2_L2A:/vsizip/D:\APSAC\Change Detection\data\S2A_MSIL2A_20190223T050811_N0211_R019_T44QMD_20190223T092437.zip/S2A_MSIL2A_20190223T050811_N0211_R019_T44QMD_20190223T092437.SAFE/MTD_MSIL2A.xml:10m:EPSG_32644" "D:\APSAC\Change Detection\data\RGB\S2A_MSIL2A_20190223T050811_N0211_R019_T44QMD_20190223T092437_10m_b8_b4_b3_b2.img" -stats -a_nodata 0

-b 2 -b 3 -b 4

gdal_translate a.tif b.tif -b 1 -b 2 -b 3