Hello, I have started this topic as as I am pretty desperate and need to try anything to resolve my problem. I use a Sony MZ-NH900 HI-MD recorder for transcriptions of old recordings, most of which are irreplaceable. Lots of separate files as all my recordings are autosplit into 1 min segments in the MD recorder) I kept the Hi-MD files on my laptop in SonicStage v4 mostly without problems. Yesterday I saw that SonicStage v4.3 was available, so I followed very carefully the steps to upgrade. This process started with a request to backup my entire library - this was done onto a connected hard drive with the verify backup box checked - to ensure the files were saved properly. The backup process seemed to start OK. No interruption to the backup process occurred. All seemed well. I had a total of 7324 minutes of recordings backed up. None of them were purchased online - all came from a Hi-MD MZ-NH900. I then clicked through the SonicStage v4.3 download and installled and rebooted. The v4.3 downloaded and installed, the SonicStage database conversion splash came on for a minute during reboot. I waited for my machine to load everything - until the disk light stopped. Launched v4.3. Long waits. Loading LIbrary - Initialising UI etc. Saw the Startup screen, only ATRAC files *.omg, *.oma, *.aa3 was checked. Do I want to import the music files on your computer? [YES] Default sources to search... Then I got SonicStage (00004b0c-336) Cannot Import the tracks. Possible reasons may include: - The track (files) cannot be found. - Special characters are used in the file name. - SonicStage does not support the file format of the track. - The track is corrupted. (Error code 00007173) [OK] Clicking [OK] you get setup completed [Finish]. My Library is blank. OK, I think I still have my verified library on my separate hard disk. Don't panic. So I began the restore process. Exit SonicStage into Backup tool - the latest version as recommended. Step 1 said "If you use music downloads, you must de-authorize your computer" I never have used music downloads, so continued. [OK] Next step 2 - Specified the backup data location: "The folder that contains your saved data" No probs, thats the external HD... Navigated to it... Had well over the necessary HD space of 3559MB Clicked next and restored to the backup source folders [next] The database was then authenticated online (took many minutes but came back with "Authentication of your database was successful" [start] The restore operation was allowed to proceed. elapsed time counting. At 6 min 55 sec I got: "Other Error has Occurred. Error Code=0x2003" but the elapsed time and estimated time remaining carried on so I left it. It counted down to zero - and then jumped back to 3 min to go! - again and again! I waited till it counted down to zero again and then clicked the only thing I could - The [OK] button from the earlier error. Pressed the [Finish] button - just got a window with "Completing Task. Please Wait" - which I did for 5 min and then it went away. Relaunched Version 4.3 - Blank Library. Used WinDirStat to check out visually all files on my backup drive - this reveals everything. There I saw a 3.5 Gb folder with 7331 files, 14655 Folders 1x big MtData.mdb Access file plus folders within = the full set of my original backups in .oma's (all my recs are in 1 min segments) If I tried to copy the root folder back to the original C drive I only am able to copy 1.53 Gb (3391 files, 6786 folders). NOTE in WinDirStat, each .oma file (representing a minute-long recording) is 478.2K which seems about right. SO 1. I have a backup but cant restore 2. I did everything very very carefully, but have still lost my files. 3. I see structure in the backup files, giving me the hope that I can somehow get them back, I need to because they are key to my work. 4. I realise therte is some form of corruption gone on here, but I checked for verification? 5. The upgrade has simply wiped out my files, without giving me any choices in the matter - should I feel very angry at Sony? 6. I will keep my backup secure until some MD genious can suggest a way forward. 7. Why can't we just browse and restore selective bits of the backup, like most other backup tools? HEEEEEEEEEEEEEEEEEEELP! IN THE MEANTIME LET THIS BE A WARNING TO OTHER UPGRADERS... I was simply upgrading and was very careful. I hope someone from Sony can also read this and realise the pain involved when these things go bad. WinXP Pro on IBM Thinkpad T42 512 Mb RAM 20Gb free HD space