The most used and easiest option is to carry out a "Quick Format" to the card, and I stress "Quick" as opposed to a "Full Format".
This will initialize the file system making the card visible and accessible again. Although this quick format will make the card appear to be empty, all your files will still be there. The quick format simply re-writes the boot sectors which tells Windows that all the space on the card is available to be written to, without actually overwriting any files.
And before you scan with Recuva go into "Options/Actions" and select "Scan for non deleted files".
This depends of course on a corrupt boot sector being the only problem and not some sort of other damage to the card or the data on it.
One of the other options is to attempt to repair the boot sectors using free software. This is more daunting that a simple quick format.
The important point here is ... if you do carry out a quick format, then you will overwrite the small backup copy of the current boot sector which windows created when the card was last formatted. There is free software which can compare the boot sector and it's copy and use the copy to rewrite the boot sector data. In theory restoring your card to it's original state.
And again, this depends on a corrupt boot sector being the only problem and not some sort of other damage to the card or the data on it.
So, let me know if you're happy to go down the easier road of a quick format, or if you want to get involved in the more complex process of trying to repair the boot sector.
Although you would have to do this yourself, I'll link you to the freeware needed, and guide you as best I can.
I am getting the same error "Unable to determine file system type" while trying to recover data from a laptop hard drive that is non-responsive by conventional means.
I have the drive hooked up to another laptop via usb to do the recovery.
Is it possible to do the same quick scan that you mentioned in your previous response?
It seems that the drive actually has a drive letter which means you could carry out a "Quick Format", not a Quick Scan as you say.
To do that you could simply right click the drive and select "format", and then make sure you choose "Quick Format". I can only show you using a screen shot of the dialogue box on my XP system after doing the right click ...
You don't mention your Operating System otherwise I could probably have found you a pic of the relevant dialogue box on your system. It might be different in some way to XP.
If you're not in any kind of a hurry, before you go down the quick format route maybe give me some more information and there may be other options to try first which don't require any writing to your drive.
What happened to the problem drive to cause the issue in the first place, and is it a "System Drive", ie containing an Operating System, or is it a data drive simply containing personal stuff like photos, music etc.?
I'm assuming from the error message you mention that it does have a drive letter, so could you tell me or show me with a screen shot how it appears in "Disk management"? And if you're not sure how to do that, let me know your Operating System and I'll be able to show you.
Your choice of course, you can do a quick format and see what Recuva can find or you could try other options first. And I repeat, the other options do not initially require the drive to be written to in any way.
I can't tell you definitively what you should do for the best outcome, but with your situation of not being able to get past the chkdsk you appeared to be attempting I think trying a quick format may be your only option.
Whether it was a software or hardware issue preventing the checking of the drive is impossible for me to even guess.
So the simplest option would be the quick format. This would not touch any of the data on the drive but be aware that there are no guarantees in file recovery, no magic bullet sadly.
Remember to go into Recuva's "Options/Actions" setting and check the "Scan for non deleted files" box. Would also be worth going into "Options/General" and set the View Mode to "Tree View". This will display any found files in their original folder structure. Much easier to drill down and choose the files you want to recover.
Also in "Options/Actions" check the "Restore Folder Structure" box and any recovered files will be saved in their original folder structure albeit a copy of that folder structure on a different drive. Saves a lot of organising.
when i tried recovering my external hard drive it said “unable to determine file system type”, so i did a quick format on my hard drive, and now it is shown as empty. But when i tried to recover it again, it still said “unable to determine…”!