If I re-flash my current stock ROM with the same ROM, will it wipe my sd card data?

I need to reflash my ROM, but I don't want to lose my data on my internal SD partition. So what would happen if I flash the same ROM that I have currently?

I have the stock S6 ROM currently on my device (G920TUVU1AOCG_G920TTMB1AOCG_TMB)

Does a travel adapter reduce current?

Hi, I'm using my Samsung Fast Wireless Charger that I just bought. Because I have an imported Note 5 (N9208 Taiwan), I have to use a travel adapter because taiwan is 2-pin plug whereas in the UK, 3-pin plugs are used. However, does the travel adapter reduce the current whilst wireless fast charging or even reduce the current when WIRED fast charging?

Roadstar RD9200U - sec_smdkv210 - Can't backup current OS image

Hi,

I am software developer. I have a Roadstar RD9200U car stereo and i want to modify os, apps or develop new apps. I rooted device with z4root but before starting i want to backup currently running os. If i make mistake i want to restore original os. CWM and TWRP are not supported this device and i can't backup current os. How can i get os image and restore? Below is my device info.

There is not a usb connector for PC but two usb hosts. I can connect with adb over wifi. If i push eject and power button while power off i think the device is searching image from sdcard and then power off. ADB backup command is not working it says that "closed".

Thanks,

sec_smdkv210
Android 2.2 Cortex A8 1Ghz
2DIN 6.2" WVGA TFT LCD (800x480)

UBOOT-20120613
Kernel-2.6.32.9-20120718
OS-v1.0-20121024_RAODSTAR_17:00
MCU-V1.32-121016
MPEG-0B.1.42-120927

APK
INIT-V1.00-20120816_16:12
RADIO-V1.00-121024-16:30
REAR-V1.00-20121015_12:00
UPGRADE-V1.00-121024-16:30
EQ-V1.00-121024-16:30
Music-V1.00-121024
iPod-V1.00-121024
AuxIn2-V1.00-121024
Video-V1.00-121024
BlueTooth-V1.00-0-121024
AuxIn1-V1.00-121024
SETTINGS-V1.00-121024-16:30
ATV-V1.00-121024
SWC-V1.00-121024-16:30
DVD-V1.00-121024
Camera-V1.00-121024

can anybody else confirm that calendar sync isn't working on current 6.0 roms?

every time i open up the calendar app, it goes through the initial setup. when i get to the calendar, nothing is displayed. i can't choose which calendars to show. going to settings > accounts >google doesn't let me choose whether to sync calendar or not (it seems everything else is there).