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Looking for a cleaning app

Hi XDA,
I'm looking for an app which can clean the internal memory of my phone and my sd-card.
When you install an app, there's always images, folders or files created. If i delete this app, these files still exist on the phone and they use space. So I would like to clean that.
Thank you,
Kerumen

[Q] How to view what is in LOST.DIR and can i delete its content?

On my android device i have folder named LOST.DIR which size is about 2 GB. I know it is some kind of recycle bin, but can i delete its content to free some space and how can i view whats in it?

dino10 said:
On my android device i have folder named LOST.DIR which size is about 2 GB. I know it is some kind of recycle bin, but can i delete its content to free some space and how can i view whats in it?
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Its the files you have deleted when using your phone. Just delete it, or all files in it.

[email protected] said:
Its the files you have deleted when using your phone. Just delete it, or all files in it.
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Ok, so that means i can safely delete it, thanks. But is there any way to view those files?

dino10 said:
Ok, so that means i can safely delete it, thanks. But is there any way to view those files?
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They seems to be just renamed and moved after a system boot.
if you cant open it, they are probably binary files. if they where photos/music you could just open them I think.

I tried this method and it did not work. After flashing cm10.2 I have a problem with my internal memory space, I have about 220 mb free space but I don't have many apps on my phone, just a few ones and they are small. So I am searching for solutions and I deleted lost.dir that situated on my external SD. That was the only lost.dir that I found. Any suggestions?

[Q] Space not freed after messing with .thumbnails

Heya guys,
this is mostly a copy of a thread I created in a device-specific forum (original thread), but since nobody was able to answer the question there and considering it doesn't seem to be device-specific after all, I figured I'd go ahead and ask here as well. The copy & paste part begins here, with slight modifications:
A few days ago, I found that I was in dire need of some more free space on my Samsung Galaxy S4 / GT-I9505's internal storage and found that only the contents of /sdcard/DCIM/.thumbnails were taking up space. After a while of trying to get rid of those files that kept creating themselves again, I followed some advice I read on an Android forum: I deleted the contents of the .thumbnail folder, went to Settings -> Apps and cleared the data of the Gallery and Media Storage apps, respectively, before rebooting the phone.
The contents did disappear for good, but neither Total Commander nor the list of installed apps in the settings nor the Storage summary in the settings showed any different amount of free space than before. To make matters worse, the number didn't even change after I found and deleted about 1 GB of files left by an already uninstalled app, i.e. it seems to be stuck on that value. At the same time, SD Maid tells me that I should have a good 5 GB of free space more than the system is showing. Neither restarting nor wiping the cache and dalvik cache helped.
My rooted GT-I9505 is running this unofficial port of AOKP 4.3, Milestone 1, and version 6.15.6 of PhilZ/CWM Advanced. I'm not sure whether there's more information I might need to provide, other than that the size of the thumbnails files apparently exploded (about 4 GB) when I moved quite a lot of data and obb folders to my external storage using FolderMount.
I didn't find any information about this kind of problem anywhere and am afraid I messed up so badly that I might need to reflash...or worse. Do you have an idea how I can try to fix it?

You could try installing Disable Service and forcing the media indexing service to never run.

gordon1986 said:
You could try installing Disable Service and forcing the media indexing service to never run.
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Thanks for the input! That sounds like a plan, but I'm not really sure whether I'm doing it right. I got the app, figured the media indexing service had to be found in the Media Storage app's entry, but I only found "MediaScannerService" and "MtpService" there. Since I try to be more careful now, I'd rather not deactivate any of those without being sure that it is what I am aiming for.
So, long story short: Is either of those the media indexing service or do I have to look somewhere else?

Best thing to do is delete the .thumbnails folder in DCIM folder. After this create a new file with the name .thumbnails in the DCIM folder.
Note: You have too delete .thumbnails FOLDER and create .thumbnails FILE. You can use es file explorer to do this.
It is based on the simple principle that in Linux ext file system a file and folder cannot have the same name.
Sent from my LT28at using xda app-developers app
Hit Thanks if this helped you.

osamaanjum said:
Best thing to do is delete the .thumbnails folder in DCIM folder. After this create a new file with the name .thumbnails in the DCIM folder.
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While I wasn't sure it would help, I tried what you suggested. Alas, it didn't work; the .thumbnails folder is empty without freeing the space taken by its former contents since I did what I described in my original post, after all. However, should I manage to fix this problem with a reflash, I suppose I'll do just that, replacing the folder with an empty file of the same name. Thanks.

It works for me.
I 've uploaded the image of DCIM directory (folder). In place of .thumbnails folder you can notice .thumbnails file.

deleted .thumbnail folder still no additional space recovered

Guyz this is my first post on xda developer and I am neewbie in this tech stuff
But I found our on this website that deleting .thumbnails in DCIM will give additional space
I also found out that its a temporary fix and android will again recreate it
I have a YU yureka
Both my internal and external sd has .thumbnails folder with sizes of both over 1 GB
I deleted them n made an empty folder with same name but I didn't gave any space I was expecting and now .thumbnails is empty as I created
Plss help I really need to make space...

dakah0123 said:
Guyz this is my first post on xda developer and I am neewbie in this tech stuff
But I found our on this website that deleting .thumbnails in DCIM will give additional space
I also found out that its a temporary fix and android will again recreate it
I have a YU yureka
Both my internal and external sd has .thumbnails folder with sizes of both over 1 GB
I deleted them n made an empty folder with same name but I didn't gave any space I was expecting and now .thumbnails is empty as I created
Plss help I really need to make space...
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Click to collapse
use a pic backup app like picasa, then, after backed up, you can delete all your pics and thumbnails and gain whatever space they were taking.
you will still be able to view your pics in the app, but they wont be taking up phone space unless you download them again.

Can I safely delete these files?

There are a bunch of folders and files on my phone that may be leftovers from apps I once tried and uninstalled. They seem to just be taking up space in my sdcard folder. Most are empty folders. What are these and can I safely delete them? I need the sdcard space.
sdcard/.chartboost
sdcard/.CM_Cloud
sdcard/.mmsyscache
sdcard/.quickdial
sdcard/.SIc-yJMAhEcjs6wmSi9Uhdeyr_M=
sdcard/catlog
sdcard/Tencent
Any help appreciated

Sorry, too early in the morning... I initially read your question as being about external SD cards - duh...
Your best bet is to copy them all - to a hard drive or Dropbox/Google Drive/OneDrive - and delete them from your SD card. Then if something fails you can restore them one by one if an app fails until you find the one that it needs.
Since none of them are in /system/ it's probably not a big risk, but take a full TWRP backup before you do anything.

That's what I was planning to do but was trying to find out what they were about first. Guess I'll need to go that route.....