Develop Bugs

How to copy any file to your WP7 device

My problem was to copy a pdf-file to my phone and after some research, I figured out that the only way to do this, is to email me this file. I think this is pretty awkward and I found an easier way to do this.
If you have a dropbox-account just move the file to your dropbox-folder on your pc, then install a dropbox-client on your phone. now you can access every file that's in the dropbox-folder from your phone... problem solved
If you're new to dropbox, I would appreciate it if you use my refferal-link so that both of us get 250MB extra free space.
Here's my referral-link: http://db.tt/OV3ERGB

Why not just use your free Skydrive? That's what I do, then navigate to your Skydrive on your phone (pin the link to your start screen for ease) and click the file's icon and it will download to your phone.
No need to use dropbox at all.

Jim Coleman said:
Why not just use your free Skydrive? That's what I do, then navigate to your Skydrive on your phone (pin the link to your start screen for ease) and click the file's icon and it will download to your phone.
No need to use dropbox at all.
Click to expand...
Click to collapse
I use dropbox too.
I think it easier because it has a Dropbox client for PC and WP7 (with app "Boxfiles for dropbox"), no need to create internet shortcut on my phone.

Why not Skydrive? Because it doesn't work half as well with either Windows or Windows Phone.
Unlike Dropbox, I can't just map my cloud storage to a folder easily on my PC.
And on my phone it doesn't let me download some files (funnily, Microsoft Office files). It shows presentations as web docs and there's no download link in default mobile view. I need to switch to desktop view which is unbearably slow.
This is plain ridiculous.

vangrieg said:
Why not Skydrive? Because it doesn't work half as well with either Windows or Windows Phone.
Unlike Dropbox, I can't just map my cloud storage to a folder easily on my PC.
And on my phone it doesn't let me download some files (funnily, Microsoft Office files). It shows presentations as web docs and there's no download link in default mobile view. I need to switch to desktop view which is unbearably slow.
This is plain ridiculous.
Click to expand...
Click to collapse
how does dropbox work with mp3s can u copy those over to device memory and add them to ur llibrary without syncing via zune?

vangrieg said:
Why not Skydrive? Because it doesn't work half as well with either Windows or Windows Phone.
Unlike Dropbox, I can't just map my cloud storage to a folder easily on my PC.
And on my phone it doesn't let me download some files (funnily, Microsoft Office files). It shows presentations as web docs and there's no download link in default mobile view. I need to switch to desktop view which is unbearably slow.
This is plain ridiculous.
Click to expand...
Click to collapse
this is being fixed in the mango update.
I don't transfer many files to my phone so its not an issue for me but I can see the frustration for some.

vangrieg said:
Unlike Dropbox, I can't just map my cloud storage to a folder easily on my PC.
Click to expand...
Click to collapse
http://mynetx.net/#!/2352/how-to-connect-your-skydrive-in-windows-explorer
or
http://www.tech-recipes.com/rx/7385/windows-7-how-to-map-skydrive-folders-as-network-drives/
or even
http://www.groovypost.com/howto/microsoft/windows-7-map-drive-skydrive-using-url-address-network/
There ya go, have fun.

I have videos on my dropbox, and BEFORE NoDo they worked, now they don't work.. tells me invalid format or times out (These would be WMV and 3GP) is it just me?

Where is the skydrive app or link on the phone.. cant find on my DVP.

At least things will get better with time. More premium apps are showing up in marketplace.

There's already a sticky thread for OS comparisons. Take this bickering, flaming, trolling there please
Sent from my Focus using XDA Windows Phone 7 App

Back on topic please!

[GUIDE] Get 50GB FREE storage with Box.com on any device [until Dec 31, 2011]

First off, I'd just like to mention that I did not write this OP. I saw it over in the: xda Android Development and Hacking > Android Apps and Games section originally posted by K Dotty. All credit for this hack/mod shoud go to (her?).
I just wanted to post it up here so that everyone in our wonderful SGSII section can take advantage of this awesome promotion before it's over. I did this myself and can confirm that it's: quick, painless and works flawlessly. Reboots and all; this whole process took me about 5-6 minutes. Hope this works for all of you, and if you need help or have a question about this please do just ask (but search the thread first).
*Random Side Note*
It does mention a backup in K Dotty's post, but I just thought I'd take one more quick opportunity to remind everyone to MAKE A BACKUP of your build.prop before you begin any of this. And in case you're wondering, I used a root explorer to edit mine (ES File Explorer to be exact).
--------------------------------------------------
OP:
I've seen this guide in various places but i thought it would be most useful in here. I have searched to see if anyone has posted this here but found nothing.
Basically Box.net are offering 50GB online storage (normally 5GB) to anyone with an LG or Xperia phone. If you dont have any of these phones you can still benifit from this offer by quickly editing your build.prop.
What you need:
- Rooted phone
- A way to edit your build.prop - build.prop editor, root explorer, etc.
- box.com app
First open your build.prop using yor prefered method and edit these two lines to look like this (MAKE A BACKUP FIRST):
ro.product.manufacturer=LGE
ro.product.model=VS910 4G
Save, reboot.
Open the box app and register for a new account and you should receive a 50GB account.
This offer ends on the 31st of december so make the most of it.
Dont forget to restore your original build.prop after.
Post a link to this thread wherever you can so everybody can make the most of this offer!!

Hmm thanks, this worked for me no problem. Can't say no to 50gb.

trilaxx said:
Hmm thanks, this worked for me no problem. Can't say no to 50gb.
Click to expand...
Click to collapse
Hey 50gigs is 50gigs. Definitely more than enough for collaborating on projects and trivial file storage. I mean it's no HD replacement, but it's free and imo better than Dropbox or SugarSync. I think of it like an extra large flash drive that I never have to remember to grab on my way out (or forget it and leave it somewhere, lol).

Tried to edit build prop, but doesn't save. What can i do to fix that?

Levi strauss said:
Tried to edit build prop, but doesn't save. What can i do to fix that?
Click to expand...
Click to collapse
Use ES file manager and go into your setting/preferences and scroll all the way down and just click on the options to "open as writable" it'll ask you for root permission and presto.
I had that same problem with astro and root explorer along with ES until I saw that option.
Sent from my SGH-T989 using xda premium

Works great. Free 50 gigs of cloud storage woot.
Sent from my Hercules with xda Premium.

Yes! to 50 GB
i had an old account with 10 GB, i could definitely use another 50, and another 50 more
got plenty of email address
but even so, i still prefer DropBox better, it's much more integrated into more Apps
Box.net is not as popular, and they have been on the market waaaaaaay longer than dropbox
--- update ---
sweet!!!!! it upgrade my old 10+ years old dummy account from 10 GB to 50 GB
you don't need to register for a new account, just by logging in to the old account, you automatically get upgraded

This worked! thanks alot! it took me a while but i got it and upgraded both my accts to 50gb!
im on a samsung t989 but my signiture says otherwise! lol
Sent from my VS910 4G using XDA App

AllGamer said:
Yes! to 50 GB
i had an old account with 10 GB, i could definitely use another 50, and another 50 more
got plenty of email address
but even so, i still prefer DropBox better, it's much more integrated into more Apps
Box.net is not as popular, and they have been on the market waaaaaaay longer than dropbox
--- update ---
sweet!!!!! it upgrade my old 10+ years old dummy account from 10 GB to 50 GB
you don't need to register for a new account, just by logging in to the old account, you automatically get upgraded
Click to expand...
Click to collapse
Haha nice now I have 250 gigs lol
Sent from my Hercules with xda Premium.

A cool thing you can do with the Box account is make a network drive on your PC so you can easily access it like a folder on your comp.
1.My computer
2.Tools
3.Map Network Drive...
4.Choose the bottom link that says "sign up for online storage or connect to a..."
5.Choose another network location
6.In the box paste in box.net/dav and click next (Put in the standard http// and www infront of the box.net/dav. I just cant post the full link because im a new member.)
7.Put in the 50gig Box account you made, login and name the drive.
Thats it, now you can easily access your 50gigs on the comp also.

THCinNYC said:
A cool thing you can do with the Box account is make a network drive on your PC so you can easily access it like a folder on your comp.
1.My computer
2.Tools
3.Map Network Drive...
4.Choose the bottom link that says "sign up for online storage or connect to a..."
5.Choose another network location
6.In the box paste in box.net/dav and click next (Put in the standard http// and www infront of the box.net/dav. I just cant post the full link because im a new member.)
7.Put in the 50gig Box account you made, login and name the drive.
Thats it, now you can easily access your 50gigs on the comp also.
Click to expand...
Click to collapse
WOW awesome
I wonder if box.net is going to figure out whats gone on here..

THCinNYC said:
A cool thing you can do with the Box account is make a network drive on your PC so you can easily access it like a folder on your comp.
Click to expand...
Click to collapse
thank you sir!

It works on existing accounts too not just new registered accounts! Great find! Thanks!

xxKamikazexx said:
Use ES file manager and go into your setting/preferences and scroll all the way down and just click on the options to "open as writable" it'll ask you for root permission and presto.
I had that same problem with astro and root explorer along with ES until I saw that option.
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
Worked like a charm, Thanks man really needed that 50gigs...

Thanks alot for the post. I logged in just to say thanks. Much appreciated!

A cool thing you can do with the Box account is make a network drive on your PC so you can easily access it like a folder on your comp.
1.My computer
2.Tools
3.Map Network Drive...
4.Choose the bottom link that says "sign up for online storage or connect to a..."
5.Choose another network location
6.In the box paste in box.net/dav and click next (Put in the standard http// and www infront of the box.net/dav. I just cant post the full link because im a new member.)
7.Put in the 50gig Box account you made, login and name the drive.
Thats it, now you can easily access your 50gigs on the comp also. .
Click to expand...
Click to collapse
Hi
This is not working can you explain more

jegavelan said:
Hi
This is not working can you explain more
Click to expand...
Click to collapse
1. From your Desktop, right-click on My Computer and select Map Network Drive, or from within Windows Explorer, choose Tools and then Map Network Drive (these options may differ from Windows XP or Windows 7)
2.Choose the bottom link that says "Connect to a web site that you can to store your documents and pictures".
3.Add network location screen will pop up click next, till you see a screen that says "specify the location of your website"
4.Inter http://www.box.net/dav/ into the box that says "Internet or network address"
5. click next, give your folder a name and your set to go.

Hey, I'm glad everyone else is pretty stoked about this also. You can never have too much storage (I was on the same page as AllGamer and used multiple accounts, lol). I'm glad that I could share this with everyone.
Also, I doubt that box.net will "get wise" to this. If they are not as popular as other big cloud services (ie. sugarsync and dropbox), and they're using a promotion like this to boost business. They we're probably hoping for/expecting a large number of new users. So lets give 'em what they're lookin' for!

Wow. That was easy. Much appreciated.
Sent from my Transformer TF101 using xda premium

Same as everyone else......many thanks for sharing......2 accounts = 100GB
and a five star vote from me.

Get EXTRA 5GB testing latest Dropbox beta!

If you don't have Dropbox account CLICK HERE to open one and get initial 2.25GB* free instead of 2GB you would normally get without referral.
*must download and install dropbox client to pc for bonus to show.
**completing 'get started' will get you another 250MB for a total of 2.5GB shortly after registering
Now for the rest that do:
"Hi everyone!
Even though the holidays have passed, we're really stoked to give you guys one more present -- a new experimental release! Under the wrapping you'll find a bunch of new toys, including a brand new Camera Upload feature. Here are the release notes:
• Automatically uploads photos and videos in the background using Wi-Fi or data plan
• 500MB of free space on first photo uploaded automatically
• Upload files of any size (no more 180 MB limit!)
• Support for resuming file uploads when there are network issues
• Various performance improvements & bug fixes
During this beta period, we are also offering additional free space to test automatic uploading of photos and videos. For every 500MB of photos and videos automatically uploaded, you'll receive another 500MB space bonus, up to 5GB total (including the initial 500MB space).
[Update: this space is not separate from 5GB given for uploading on our desktop clients. Uploading from either desktop clients or Android app will count towards the same 5GB free space.]
Grab the APK directly from here:
http://db.tt/4ZL2gCdt
or scan this QR Code:
http://qrcode.kaywa.com/img.php?s=8&d=http://db.tt/4ZL2gCdt
Check it out and let us know what you think!"
Click to expand...
Click to collapse
Those that would rather make that 5GB uploading form computer:
"Hello Forum users!
Another day another build. We're trying to snipe all the most common bugs. Keep plugging in those cameras!
During this beta period, we are also offering additional free space to test automatic uploading of photos and videos. For every 500MB of photos and videos automatically uploaded, you'll receive another 500MB space bonus, up to 4.5GB total. [Update: To clarify, you can get up to 5GB of free space with this feature, if you count the initial 500MB space for the first photo import].
1.3.12
500MB of free space on first photo import
Cleanup UI in Windows non admin installation.
Fix infinite restart of Dropbox when database was corrupted.
Fix import error on iPhone with lots and lots of photos.
Better Handling of out of quota issues on first photo import.
Other small fixes
1.3 Features
Importing of photos from cameras, phones, and SD cards.
Batch upload/download of files.
Windows: http://dl-web.dropbox.com/u/17/Dropbox 1.3.12.exe
Mac OS X: http://dl-web.dropbox.com/u/17/Dropbox 1.3.12.dmg
Linux x86_64: http://dl-web.dropbox.com/u/17/dropbox-lnx.x86_64-1.3.12.tar.gz
Linux x86: http://dl-web.dropbox.com/u/17/dropbox-lnx.x86-1.3.12.tar.gz
Notes:
Clients 1.3.5 and earlier had an auto-update bug. Please install this version so that your client will stay up to date!
The photo import feature is not available on Mac 10.4 and Linux.
For Android devices, it's best to use "Connect as Disk Drive". HTC Sync will not work.
To import from iPhone, make sure to unlock your phone and enter your passcode before importing, otherwise it will claim to find no photos.
If importing from your iPhone on Mac gives an import error, try hard resetting it--hold down the power and the home button for 5 seconds. This will reboot the phone; it shouldn't change your settings or delete data.
On Windows, this feature relies on Autoplay. Please enable Autoplay to use this feature if you have disabled it.
On XP and Vista, it relies on the Windows Image Acquisition Service. If this service is not started, please start the service and reinstall Dropbox to use this feature. On WIndows Server, you may have to install the Desktop Experience feature.
On Windows 7, newer devices that rely on Device Stage (in the Control Panel) will not show Dropbox as an import option until you select "Change Program" for the default.
The Galaxy Nexus takes a lot of time to connect on OS X because it likes to pretend that every image on the device is a photograph. We now estimate how long it's going to take and show you that in the progress bar but it's usually in the order of minutes. We're working to see if this can be improved.
As usual, we strongly recommend making a backup of your Dropbox before upgrading to this build as we'll need a few weeks to be certain of its stability. We will rapidly release new builds as necessary to snipe the most common issues as they arise."
Click to expand...
Click to collapse
Enjoy and hury while beta testing lasts!

Thansk mate. Using the latest version now. Hope to get some more free space...

Note that only auto upload gives you free space. Manual selecting files no matter how big they are even from camera folder will not give you bonus space.
Easily solved though. Turn on autoupload in dropbox client (its limited to 25mb per file for GSM uploads but can be changed to unlimited if you so desire and your plan covers it) and take some 3-5 minute videos with 1080p resolution. Those quickly fill requirements and can be deleted after.
Sent from my GT-I9100

Thank you a lot! I'm just recording nothing for 5 minutes and record again. Gonna get 5gb in no time. I love Dropbox!

Thanks for this!

freemini said:
Thank you a lot! I'm just recording nothing for 5 minutes and record again. Gonna get 5gb in no time. I love Dropbox!
Click to expand...
Click to collapse
Fastest way (tip i saw on g+) is to use beta desktop client provided in first post with those blank videos (you can put any avi or mp4 video on usb as well as long as it is in the dcim/camera foler and has not been uploaded to dropbox before and note 'renaming does not work') and use autorun dropbox import function.
must connect in mass storage mode or just plug microsd card ( usb reader and external hard drive does work as long as you keep proper folder structure dcim/camera). allow import to complete then in dropbox client 'pause syncing'. go to dropbox 'camera uploads' folder and delete files. again in dropbox client 'resume syncing' and thats it.
you just maxed 5GB without wasting all that time and bandwith!
note:you must have at least 4.5GB in pics and videos plus that one initial picture
another note: your maximum in pics and videos you want to import can not be greater than total dropbox ammount available to you or it will fail to sync properly. so best keep it around 5 just in case.

The free space is forever?
thanks for the apk

technically yes. well for as long as they are in business or they decide to take it away lol.

Awesome thanks for bringing this to xda....
Cheers

after dropbox, google music, onlive, hulu and all the "cloud solution" available, i wondering how they will sell big storage ( and expensive ) phones

it didn't add 5GB to my free space. And to many many other users (I checked other websites). So it is fake!

golcheck said:
it didn't add 5GB to my free space. And to many many other users (I checked other websites). So it is fake!
Click to expand...
Click to collapse
It has worked for me, definitely not fake

TvBTvB said:
It has worked for me, definitely not fake
Click to expand...
Click to collapse
how did you do that?
---------- Post added at 10:13 PM ---------- Previous post was at 10:05 PM ----------
Oh I got it....for every 500MB of photos I get additional 500MB, up to 4.5GB.....

golcheck said:
how did you do that?
Click to expand...
Click to collapse
1 (Not required) Exit dropbox (right click tray: Exit)
2 Collect 5GB of .avi's on your pc (If you have 5GB storage space, if you have 2GB, collect 2GB of .avi's)
3 Copy the .avi's to your phone in DCIM/Camera folder
4 Install/Update your desktop(Windows etc. Not android!) dropbox client from the first post
5 Make sure dropbox is running
6 Connect your phone in mass storage mode
7 From the action pop-up in Windows choose: Import with dropbox
8 Wait until import is complete
9 While dropbox is uploading the files (After indexing!) right-click the tray icon and select 'pause syncing'
10 Delete the avi's from Dropbox/Camera Uploads folder
11 Right-click the tray icon and select 'resume syncing'
12 Done!
Thanks to Idan73 of course!

golcheck said:
it didn't add 5GB to my free space. And to many many other users (I checked other websites). So it is fake!
Click to expand...
Click to collapse
Reread all 3 of my posts on this page dealing with this and you'll have your solution.
Sent from my GT-I9100

TvBTvB said:
2 Collect 5GB of .avi's on your pc (If you have 5GB storage space, if you have 2GB, collect 2GB of .avi's)
Click to expand...
Click to collapse
Just small correction and explanation on this.
You can put 5GB of videos right away because you initially have 2GB at least and as long as you have at least largest individual file size free in the account you'll be fine. Cause it will be auto bumped by 500MB increments.
My note in one of the posts above referred to people with for example 4gb free trying to sync 17gb i read somewhere.
Sent from my GT-I9100

TvBTvB said:
1 (Not required) Exit dropbox (right click tray: Exit)
2 Collect 5GB of .avi's on your pc (If you have 5GB storage space, if you have 2GB, collect 2GB of .avi's)
3 Copy the .avi's to your phone in DCIM/Camera folder
4 Install/Update your desktop(Windows etc. Not android!) dropbox client from the first post
5 Make sure dropbox is running
6 Connect your phone in mass storage mode
7 From the action pop-up in Windows choose: Import with dropbox
8 Wait until import is complete
9 While dropbox is uploading the files (After indexing!) right-click the tray icon and select 'pause syncing'
10 Delete the avi's from Dropbox/Camera Uploads folder
11 Right-click the tray icon and select 'resume syncing'
12 Done!
Thanks to Idan73 of course!
Click to expand...
Click to collapse
Thanks to you and Idan73. Worked as a charm

select all
I would like to see the feature select or/and deselect
Cheers

Idan73 said:
Fastest way (tip i saw on g+) is to use beta desktop client provided in first post with those blank videos (you can put any avi or mp4 video on usb as well as long as it is in the dcim/camera foler and has not been uploaded to dropbox before and note 'renaming does not work') and use autorun dropbox import function.
must connect in mass storage mode or just plug microsd card (some reports suggest usb reader and external hard drive does not work). allow import to complete then in dropbox client 'pause syncing'. go to dropbox 'camera uploads' folder and delete files. again in dropbox client 'resume syncing' and thats it.
you just maxed 5GB without wasting all that time and bandwith!
note:you must have at least 4.5GB in pics and videos plus that one initial picture
another note: your maximum in pics and videos you want to import can not be greater than total dropbox ammount available to you or it will fail to sync properly. so best keep it around 5 just in case.
Click to expand...
Click to collapse
Could you be a little more clear? IE can you use USB sticks?

Mullicious said:
Could you be a little more clear? IE can you use USB sticks?
Click to expand...
Click to collapse
Right in the middle "some reports suggest... " yes that includes sticks... Haven't tested personally. You could try and let us know. If it works for you I will change post accordingly.
@tvbtvb has made concise step by step rewrite of this few posts up ^^^.
Sent from my GT-I9100

50GB Cloud Storage for Free! (box.com)

This is great news that could end the mirroring/uploading issue for ROM developers!
Go here:
http://box.com
and install the Android app and you get 50GB lifetime storage for free!
Source:
http://www.theverge.com/2012/2/23/2819690/box-50gb-free-storage-android-deal
Enjoy.

I've tried it. It still works..

Some tips:
For complete SD Card sync to box.com:
download (free) app FolderSync Lite
To access the box.com on OSX via WebDav:
In Finder, press cmd+K and type:
https://www.box.com/dav
And for PC users (mapping network drive):
http://www.webosnation.com/map-box-net-network-drive-your-computer

Whilst this is a great offer I'm finding it does not integrate quite as well as Dropbox does. Drop box seems to do a better job of sync'ing across multiple platforms (I use Android handset and tablet, Ubuntu and win7 on a daily basis) especially with things like recently taken photos. I would also say from my perspective Drop box has a better user interface especially in the desktop environment.
For the moment I'm going to run both using the Box option for my longer term backed up storage and Dropbox for the everyday transferring files around.

what's the file upload image?
i got the 50GB from box.com when the HP Touchpad's came out and I was sure the max upload was crazy like 100MB - which put me right off.
Minus.com seemed a better deal - quickly got up to 50GB storage with them and the upload limits are bit more generours

Lothaen said:
what's the file upload image?
i got the 50GB from box.com when the HP Touchpad's came out and I was sure the max upload was crazy like 100MB - which put me right off.
Click to expand...
Click to collapse
Max upload like 100MB is normal. Microsoft skydrive have the same limitations and some other clouds also.

Gandoran said:
Max upload like 100MB is normal. Microsoft skydrive have the same limitations and some other clouds also.
Click to expand...
Click to collapse
not sure why I wrote file size image when i meant limit lol
minus says:
Is there a maximum file size I can upload?
The size limit currently is 2 GB per file with unlimited uploads and 10 GB of free space to start.
if anyone wants to join here's my invitation link: http://min.us/rdiBKVs
I get nothing (as I have the max of 50GB already) but you get an extra 1GB

I upload via ES File Explorer and don't seem to have any limits
In ES File Explorer select "net" and add server...
Enjoy.

Lothaen said:
what's the file upload image?
i got the 50GB from box.com when the HP Touchpad's came out and I was sure the max upload was crazy like 100MB - which put me right off.
Minus.com seemed a better deal - quickly got up to 50GB storage with them and the upload limits are bit more generours
Click to expand...
Click to collapse
Thank you.
2 GB file size limit sounds nice

Brilliant hint on using esfile explorer. Was annoying me having so much space and no way of uploading folders
Sent from my Desire using XDA App

nice!
thank you for this info!

sudkcoce said:
I upload via ES File Explorer and don't seem to have any limits
In ES File Explorer select "net" and add server...
Enjoy.
Click to expand...
Click to collapse
Thanks for the hint. I'll try with file expert and see if that works too. File explorer kept telling me I wasn't rooted and wouldn't let me access the root so I swapped.

Just signed up, thanks 4 the info.

Thank you very much!

[Q] Dropbox 50GB - Where is it stored on your device?

The SGN2 will probably get 50GB Dropbox for free.
How does this work on Android? On my PC there is a local folder that gets synced with Dropbox but if it works the same on Android where is the data stored if you only have 16GB on your device?
Can you get Dropbox to work with an SD Card? With a 64GB SD card I could get all my 50GB Dropbox data on there.

No, it only saves files you open. If you open a document, it's gonna cache it on the Internal memory. AFAIK there's no way of making it sync like a desktop does.

freemini said:
No, it only saves files you open. If you open a document, it's gonna cache it on the Internal memory. AFAIK there's no way of making it sync like a desktop does.
Click to expand...
Click to collapse
on my Htc Sensation if i take a pic it syncs that pic straight to drop box then i can delete the one on the phone.

You will need this to sync files
https://play.google.com/store/apps/details?id=com.ttxapps.dropsync
Sent from my GT-N7000 using xda premium

There is a "star" option in dropbox app which allows you to get offline access to your favorite (stared) files.
So i keep there the files i really need on the go.

It doesnot save files on your device it saves it online in cloud servers of dropbox.