Can point in detail, thank you

Unable to backup, everybody is good, my wallet after click backup in the stub just backup file cannot be found in directory, or simply play a window to window, then the wallet turn off automatically. Thank you for your attention

大家好，我钱包无法备份，点击备份后在存根目录中无法找到刚刚备份的文件，或是直接弹窗一个窗口，然后钱包自动关掉。谢谢大家

thank you

听说把币存在钱包有利息，是吗？大神们能帮解答下吗，谢谢大家