find "/path" -type f -ctime +30

When I use the command

find "/abc/xyz" -type f -ctime +30

getting the error as

find:"/abc/xyz /lost+found: Permission Denied"

I tired

find  "/abc/xyz" -type d \( ! lost+found \)  -type f  -ctime +30

The error is

find: paths must precede expression Usage: find [-H] [-L] [-P] [path...] [expression]

Tried

find  "/abc/xyz" -maxdepth 1  -type f  -ctime +30

it is searching in current directory, but I have sub directories in /xyz folder

Could any one help me how to solve the issue.

Thanks in advance,

Perhaps something more like:

find  "/abc/xyz" \( -name lost+found -prune \) -o -type f -ctime +30

would work better for you.