[Q] /data folder - Samsung Galaxy S (4G Model)

Does anybody gain application storage by removing "useless" application from that folder?

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Internal Storage Maintenance

Hello. First of all, WM5torage cannot access wm6(.1) internal storage. So my question would be - how to I maintain the internal file system? I know ROM files are locked and refer to a special file system type but still: Is there a way to checkdisk etc the internal storage?
SOLVED
SKTools (Trial) can do this!

[Q] Whole sdcard ext2/ext4 only

Hey!
I want to sync the DCIM folder with my Dropbox/Photos folder.
Problem: FAT doesn't support symlinks.
Is it possible to set up one ext2/ext4 partition for the Data & APP2SD and one fat32 for media exchange?
As there's no /etc/fstab in Android the filesystems have to be listed somewhere else. Does anyone know where? Or is there a fixed pattern which partitions are used?
Is there a solution for moving the journalling of ext4 to the internal memory? Afaik this would increase speed.

Create unwritable folder in internal storage?

Is there a way to create or make a (one) folder unwritable on the internal storage which stops the system writing to it?

Cannot move files in external sdcard android/data folder

I'm using marshmallow 6.0.1
I think from 5.0 lollipop moving files in external sd android/data folder is not possible. Files created by apps, mostly received from wifi sharing are stored inside android/data/<app folder> by few apps. These files cannot be directly moved to any root directory of external sd. When moving it's copying and deleting those files, like moving to another drive even thought it's the same drive .
This makes a particular problem when the external sd storage is low. For an example in order to move a 2GB file from external_sd/android/data/<app folder> to external_sd/Movies system required additional 2GB, it copies the file and then deletes the source file. So moving is not possible if the free space is below 2GB .
Internal sd android/data folder doesn't have this issue, moving files is direct and quick(without copying and deleting).
I'm guessing it's because of the owner permissions of the android/data folders and root folders . Is there any workaround to make files move without copy-moving from external_sd/android/data folder to external_sd/<any folder other than android> without root .

[Q] Create shortcut to SD crad inside internal folder

Hello,
I'd like to create a shortcut or link inside the internal memory folder to point to the external SD card. (Like a shortcut in Windows Explorer.) If I have to use symbolic link I will but I'm afraid this would mess up some apps that scan the internal memory (send it into a circular loop.) I am trying to access the SD card quickly from within the internal disk, when any app shows me that folder. (Basically some apps like CameraMX are STILL failing to show the SD card, even with Root.)
Can anyone help me create the shortcut or link? My mount point for SD is: root/mnt/media_rw/6664-6330. My filesystem is NTFS.
I have: Root Explorer, Solid Explorer, MiX, Terminal.
I tried searching google and XDA but it's hard to eliminate threads talking about the homescreen or adoptable storage. Sorry if this has already been discussed.

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