Wnen i tried to to download the file from my mails account in Samsung galaxy S mobile ..Its show no possibility because sd-card failed . But i have extern and intern SD card ?? i have installed android 2.1

Get freeware recovery software on web..DON'T use card any further to avoid putting new images on spots where old ones were deleted.

Then you can recover deleted items.

Plug your phone your PC via the data link cable (USB) and use Windows Explorer (in a PC) or a file explorer/manager on your phone to copy and paste the file that you want and put them in the phone folder of your choice.

Usually the SD card is a secondary storage device ... and separate from the (internal) phone memory. To determine / test this, see if your phone still have (some) information when you remove the SD card from the phone... e.g. your telephone contact list, etc.
Yes, you can try to recover the "deleted" file on the SD card using a PC / laptop ... using a data recovery utility/tool (on your PC) to scan the storage space or "undelete" that deleted file..

If your phone can be attached to a PC (e.g. via USB), and if your PC recognizes the "storage" disk on your phone as an "external" disk, you may also be able to use a data recovery utility to scan the storage space or "undelete" that deleted file.

Go to the play store and download a file management app. Use the app to move the files. OR, connect to a PC and manually move the files to the SD card

Definitely Yes! First of all, you should stop saving any new files to your Samsung smart phone (or SD card) or taking new pictures.

Then find some photo recovery software from this site Best Computer Software, which are able to recover deleted or formatted photos from cell phone, digital camera, memory card and SD card etc.

Digital Photo Recovery for Windows

Digital Photo Recovery for Mac OS X

Here are the steps:

Step 1: Download and install the Digital Photo Recovery Software.

Step 2: Connect your Samsung smart phone (or SD card, memory card etc) to your PC or Mac.

Step 3: Scan the source drive where your lost pictures located.

Step 4: Recover the lost pictures and save them to another drive instead of the source drive.

My samsung galaxy p1000 camera keeps failing when turn it on

Undelete files from Samsung Galaxy phone is possible, however, to make sure that you are able to recover data from samsung mobile phone, stop using the mobile phone immediately, and then follow steps below
1. Switch off mobile phone and unmount memory card from samsung mobile phone
2. Connect memory card to computer with a card reader
3. follow this memory card recovery guide to recover data from mobile phone memory card
How to Recover photos from Memory Card
4. you can continue use the mobile phone as normal after data recovery.

You may try this picture recovery software called asoftech photo recovery which helped me before. You can download trial for free
http://www.asoftech.com/apr/

Please be noted that your phone memory should show as a drive letter in your explorer, if not, you need to take out your memory card and connect using a card reader, or plug-in to card reader slot if there's any on your computer.