Can you fix corrupt files on external hard drive?


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I stupidly moved instead of copied about 50 GB of videos and documents to an external hard drive. Everything was in one folder and I just moved it and went away from the computer for an hour or so figuring it would take a while. When I tried to look and make sure everything went alright some things opened up fine and others didn't respond at all and seemed to lock everything down. So I tried moving them back to the computer hard drive with similar results. I posted about this a week or so ago but since then have had some luck getting back about 20 GB by moving them back to the computer hard drive pretty much one at a time. Some of them would work and do fine. Others would seem to be working and then get so far along with the process and quit working. Some of them don't even try but instead everything seems to lock up and that blue circle thing goes around and around until I finally disconnect the external drive. During one attempt and only one of many attempts so far it gave the message: "The request could not be performed because of an I/O device error". Since then I haven't tried anything else but in looking at a few things about that message get the idea that maybe the files that don't respond got corrupted or something because I moved them incorrectly and maybe there is something that can clean things up on that external hard drive? When I check the properties on it it says it still has over 30 GB which would be right because what I moved was over 50 GB. So the info is probably still on there but messed up and maybe there's a way to fix it, or at least some of it? Here is information about my computer and the external drive if that can help tell anyone anything:

:Windows 10 Pro version 1903 OS build 18362.720 Installed RAM 12.0 GB (11.8 GB usable)Processor Intel(R) Core(TM) i3-3220 CPU @ 3.30 GHz64-bit operating system, x64-based processorFile system: NTFS Used space: 170 GB Free space: 61.6 GBWDC WD2502ABYS-18B7A0 Disk drivesBaseBoard Manufacturer LENOVO Version Win8 Pro DPK TPG

On the external hard drive it says: 2.5" SATA HDD/SSD External Case USB3. 0 Support 3TB it also has a list of things on the back, here are some of them:
1. During format process, our hard disk will choose exFAT automatically as default efficient format. Please DO NOT select NTFS manually, this format is not supported by our hard disk, will cause disk crash.
3. QC Passed, Hard Disk Formatted already before packing & shipping, there is no need to reformat when first use.
2. Only Data Storage, Read & Write is supported on MAC OS, formatting is not supported on MAC OS otherwise it will damage the disk.
4. Special attention to our products (partitions are not supported), partitioning will cause damage to the hard disk. For safer and longer service life, use it directly as one independent partition.I didn't try formatting or anything and it didn't say anything about it itself.

Some people have suggested it's a PC trying to read MAC formatting or something like that or the cord it bad. But it's not something that is having a negative influence on everything on the drive, only on about 70% or so.

Thank you for any help!

David
USA
 
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I have 2 WDC 4TB drives that came formatted as exFAT, the box listed PC/Windows and Mac as compatible. I also had a 2TB model that failed without warning and like you it had some old-time movies and music videos. In my case the internal USB to SATA interface failed but a 5GB Mac was still there. The down side is that none of the recovery software was able to retrieve usable data from that drive, what was saved appeared okay except for the files sizes that should have been 350MB to 700MB were way too large, in the GB sizes.

Mac OS X can natively read NTFS drives but seldom can write to them without an additional program, can't say about the newer macOS, my MacBook died during the Upgrade to it. PC/Windows can't generally work with a Mac drive, needs the exFAT formatting. [Reminder, leave FAT32 formatting out of the equation, Windows has issues with its 32GB drive/partition size limit.]
 
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Wonder what Recovery software was used... (I hate to loose anything, My Clients hate it more than me.)
Wonder what HHD (Disk) is in question, The only HHD/SSD that i have encountered that are DEFAULT exFat are USBs.
and I have had to use (HDD Regenerator to fix many corrupt HDDs) never tested on a SSD. PS: once the HDD has been Regenerated it has never for me lost a program.
@David (Some people have suggested it's a PC trying to read MAC formatting or something like that or the cord it bad. But it's not something that is having a negative influence on everything on the drive, only on about 70% or so.) can you clarify this statement.
 
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Most FREE programs are very limited on amounts of data to be recovered. and if the Data is work recovery to me it is worth the purchase of a very good Data Recovery Program.
 

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