Etiquettes and respect for the Quraan

Q: I have too many Quraan cassettes. Can I throw them in a recycle box or what do I do with them?

Q: I have disrespected Quran many times. Most of the time it is unintentionally. But it happens many times. Such as today, I was reading Quran keeping it over two pillows and while reciting, it suddenly dropped down and touched my feet. My eyes were closed because I was reciting from memory. Many times the Quran Sharif dropped from my hand. I unintentionally touched it without wudu and it was touched by my feet one more time in my life when I was young. What do I do since it burdens my mind?

Q: When one is travelling for hajj. Can one put the Quraan Shareef in the suitcase.

Q: If I read Quran without wudu but touching the Quran with a cloth around it, is it a sin?

Q: Can I write Quran with needle and thread?

Q:

1. Can we recite/touch Quranic verses on mobile or laptop screen without wuzu?

2. Similarly, during her period, can a girl touch Quranic verses and their translation e.g. if a girl is learning tarjuma and tafseer, then can she continue to learn this way on the phone without reciting the Quranic verses, just scrolling down and learnng visually?

Q: Is it permissible to hold books/folders that contain parts of the Quran (a few surahs for example) without wudu?

Q: Can I pray the Quran on my mobile without having wudhu?

Q: I teach children Quran. I read quran for them while the mushaf is facing towards them, i.e. I read it turned 180 degrees. Is this permissible?

Q: Is it necessary to have wudhu to touch the Qai'da because it contains Qur'anic verses?