Error when sync or when 'Transfer purchases from iPhone-Name'

We are backing up our iPhone 6 plus and wanted to assure that also the apps were backed up so beside "sync" we also did a File >> Device >> Transfer purchases from iPhone-Name'.

However, we keep getting this error:
iphone-err
Attempting to copy to the disk "XXXXX" faild.  An unknown error occurred (54)

We google it and recommended to restart PC.

We did and same error

After click OK, the sync icon keeps turning as if syncing (if we click on it's X, it says canceling sync).

Should we worry about this error?

Can we complete the backup or sync or the error prevent from a correct backup?

What should we do?
LVL 1
janaAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Shabbir RaoCommented:
First of all I would advice you not to worry. It will get resolve automatically.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
janaAuthor Commented:
Ok just woke up and the phone has been updated (all icons are in gray or non-use form, like it's being downloaded).

Ok will wait to see.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
iPhone

From novice to tech pro — start learning today.