Lack of some functions after migration from a broken USB flash drive

Hi team,

Here is my story.

I've been using PortableApps for years. I've changed 3 of 4 USB flash drives for that period. My previos USB flash drive worked fine but couple months ago it broke. Fortunately I've manged to read all data. I took another USB flash drive, performed format (exFAT) and copy all portable applications and data. Then I launched Start.exe as usual. It seemed everything worked fine. But some days later I discovered that at least two applications work not as expected.

Issue #1 -- Mozilla Firefox Portable
I cannot use Firefox Sync (Accounts). I receive the error message "Cookies are still disabled". I've checked all relevant FAQs (e.g. https://support.mozilla.org/en-US/kb/firefox-sync-troubleshooting-and-ti...) but the problem remains. Please note that Mozilla Firefox installed locally (C: drive) works fine including Firefox Sync.

Issue #2 -- Skype Portable
I cannot send and receive files. Any files. I receive the error message "File transfer failed. There was a problem sending this file". And again, Skype installed locally (C: drive) works fine including transfer files both directions (send, receive).

Anyone can help?

Thanks!

Andrei